Vulnerability-Lookup

alsa-2026:66180

Vulnerability from osv_almalinux

Published

2026-09-09 00:00

Modified

2026-09-11 15:50

Summary

Important: kernel security, bug fix, and enhancement update

Details

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (CVE-2026-43133)
kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() (CVE-2026-43339)
kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493)
kernel: tcp: call sk_data_ready() after listener migration (CVE-2026-46015)
kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() (CVE-2026-46149)
kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP (CVE-2026-46266)
kernel: flow_dissector: do not dissect PPPoE PFC frames (CVE-2026-46306)
kernel: Revert "net/smc: Introduce TCP ULP support" (CVE-2026-46330)
kernel: netfilter: conntrack: remove sprintf usage (CVE-2026-53002)
kernel: net: guard timestamp cmsgs to real error queue skbs (CVE-2026-53223)
kernel: ipv6: mcast: Fix use-after-free when processing MLD queries (CVE-2026-53275)
kernel: ipv4: account for fraggap on the paged allocation path (CVE-2026-53366)
kernel: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer (CVE-2026-64034)
kernel: rhashtable: clear stale iter->p on table restart (CVE-2026-64563)
kernel: smb: client: fix double-free in SMB2_close() replay (CVE-2026-64597)
kernel: nvmet-rdma: handle inline data with a nonzero offset (CVE-2026-72129)
kernel: net: bridge: stop fast-leave after deleting a port group (CVE-2026-74480)

Bug Fix(es) and Enhancement(s):

KSM to deduplicate only zero pages [almalinux-9.8.z] (JIRA:AlmaLinux-249161)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:66180	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-43133	REPORT
	https://access.redhat.com/security/cve/CVE-2026-43339	REPORT
	https://access.redhat.com/security/cve/CVE-2026-43493	REPORT
	https://access.redhat.com/security/cve/CVE-2026-46015	REPORT
	https://access.redhat.com/security/cve/CVE-2026-46149	REPORT
	https://access.redhat.com/security/cve/CVE-2026-46266	REPORT
	https://access.redhat.com/security/cve/CVE-2026-46306	REPORT
	https://access.redhat.com/security/cve/CVE-2026-46330	REPORT
	https://access.redhat.com/security/cve/CVE-2026-53002	REPORT
	https://access.redhat.com/security/cve/CVE-2026-53223	REPORT
	https://access.redhat.com/security/cve/CVE-2026-53275	REPORT
	https://access.redhat.com/security/cve/CVE-2026-53366	REPORT
	https://access.redhat.com/security/cve/CVE-2026-64034	REPORT
	https://access.redhat.com/security/cve/CVE-2026-64563	REPORT
	https://access.redhat.com/security/cve/CVE-2026-64597	REPORT
	https://access.redhat.com/security/cve/CVE-2026-72129	REPORT
	https://access.redhat.com/security/cve/CVE-2026-74480	REPORT
	https://bugzilla.redhat.com/2467065	REPORT
	https://bugzilla.redhat.com/2468102	REPORT
	https://bugzilla.redhat.com/2479812	REPORT
	https://bugzilla.redhat.com/2481936	REPORT
	https://bugzilla.redhat.com/2482566	REPORT
	https://bugzilla.redhat.com/2484456	REPORT
	https://bugzilla.redhat.com/2486463	REPORT
	https://bugzilla.redhat.com/2486999	REPORT
	https://bugzilla.redhat.com/2492329	REPORT
	https://bugzilla.redhat.com/2492811	REPORT
	https://bugzilla.redhat.com/2492841	REPORT
	https://bugzilla.redhat.com/2501252	REPORT
	https://bugzilla.redhat.com/2502394	REPORT
	https://bugzilla.redhat.com/2510892	REPORT
	https://bugzilla.redhat.com/2511932	REPORT
	https://bugzilla.redhat.com/2516731	REPORT
	https://bugzilla.redhat.com/2517046	REPORT
	https://errata.almalinux.org/9/ALSA-2026-66180.html	ADVISORY

JSON

To clipboard

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  "details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.  \n\nSecurity Fix(es):  \n\n  * kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (CVE-2026-43133)\n  * kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() (CVE-2026-43339)\n  * kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493)\n  * kernel: tcp: call sk_data_ready() after listener migration (CVE-2026-46015)\n  * kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() (CVE-2026-46149)\n  * kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP (CVE-2026-46266)\n  * kernel: flow_dissector: do not dissect PPPoE PFC frames (CVE-2026-46306)\n  * kernel: Revert \"net/smc: Introduce TCP ULP support\" (CVE-2026-46330)\n  * kernel: netfilter: conntrack: remove sprintf usage (CVE-2026-53002)\n  * kernel: net: guard timestamp cmsgs to real error queue skbs (CVE-2026-53223)\n  * kernel: ipv6: mcast: Fix use-after-free when processing MLD queries (CVE-2026-53275)\n  * kernel: ipv4: account for fraggap on the paged allocation path (CVE-2026-53366)\n  * kernel: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer (CVE-2026-64034)\n  * kernel: rhashtable: clear stale iter-\u003ep on table restart (CVE-2026-64563)\n  * kernel: smb: client: fix double-free in SMB2_close() replay (CVE-2026-64597)\n  * kernel: nvmet-rdma: handle inline data with a nonzero offset (CVE-2026-72129)\n  * kernel: net: bridge: stop fast-leave after deleting a port group (CVE-2026-74480)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * KSM to deduplicate only zero pages [almalinux-9.8.z] (JIRA:AlmaLinux-249161)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:66180",
  "modified": "2026-09-11T15:50:57Z",
  "published": "2026-09-09T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:66180"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-43133"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-43339"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-43493"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-46015"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-46149"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-46266"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-46306"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-46330"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53002"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53223"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53275"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-53366"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-64034"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-64563"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-64597"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-72129"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-74480"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2467065"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2468102"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2479812"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2481936"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2482566"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2484456"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2486463"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2486999"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2492329"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2492811"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2492841"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2501252"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2502394"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2510892"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2511932"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2516731"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517046"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2026-66180.html"
    }
  ],
  "related": [
    "CVE-2026-43133",
    "CVE-2026-43339",
    "CVE-2026-43493",
    "CVE-2026-46015",
    "CVE-2026-46149",
    "CVE-2026-46266",
    "CVE-2026-46306",
    "CVE-2026-46330",
    "CVE-2026-53002",
    "CVE-2026-53223",
    "CVE-2026-53275",
    "CVE-2026-53366",
    "CVE-2026-64034",
    "CVE-2026-64563",
    "CVE-2026-64597",
    "CVE-2026-72129",
    "CVE-2026-74480"
  ],
  "summary": "Important: kernel security, bug fix, and enhancement update"
}

CVE-2026-53275 (GCVE-0-2026-53275)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-09-08 08:50

Title

ipv6: mcast: Fix use-after-free when processing MLD queries

Summary

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: Fix use-after-free when processing MLD queries When processing an MLD query, a pointer to the multicast group address is retrieved when initially parsing the packet. This pointer is later dereferenced without being reloaded despite the fact that the skb header might have been reallocated following the pskb_may_pull() calls, leading to a use-after-free [1]. Fix by copying the multicast group address when the packet is initially parsed. [1] BUG: KASAN: slab-use-after-free in __mld_query_work (net/ipv6/mcast.c:1512) Read of size 8 at addr ffff8881154b8e90 by task kworker/4:1/118 Workqueue: mld mld_query_work Call Trace: <TASK> dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120) print_address_description.constprop.0 (mm/kasan/report.c:378) print_report (mm/kasan/report.c:482) kasan_report (mm/kasan/report.c:595) __mld_query_work (net/ipv6/mcast.c:1512) mld_query_work (net/ipv6/mcast.c:1563) process_one_work (kernel/workqueue.c:3314) worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245) </TASK> [...] Freed by task 118: kasan_save_stack (mm/kasan/common.c:57) kasan_save_track (mm/kasan/common.c:78) kasan_save_free_info (mm/kasan/generic.c:584) __kasan_slab_free (mm/kasan/common.c:253 mm/kasan/common.c:285) kfree (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6251 mm/slub.c:6566) pskb_expand_head (net/core/skbuff.c:2335) __pskb_pull_tail (net/core/skbuff.c:2878 (discriminator 4)) __mld_query_work (net/ipv6/mcast.c:1495 (discriminator 1)) mld_query_work (net/ipv6/mcast.c:1563) process_one_work (kernel/workqueue.c:3314) worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245)

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

9 references

URL	Tags
https://git.kernel.org/stable/c/dfaf1f5e7eb81be87…
https://git.kernel.org/stable/c/1354271c89d0e5fbf…
https://git.kernel.org/stable/c/53baa63a418329157…
https://git.kernel.org/stable/c/2a613bf497029d555…
https://git.kernel.org/stable/c/b2eb8886200b907fc…
https://git.kernel.org/stable/c/4203806f700bb44ea…
https://git.kernel.org/stable/c/087dbacf897c020f4…
https://git.kernel.org/stable/c/791c91dc7a9dfb245…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

5 products

Vendor	Product	Version
Linux	Linux	Affected: 97300b5fdfe28c6edae926926f9467a27cf5889c , < dfaf1f5e7eb81be87582bd6a57d34e61a57d5dea (git) Affected: 97300b5fdfe28c6edae926926f9467a27cf5889c , < 1354271c89d0e5fbf8b3d94097ff0216695209c7 (git) Affected: 97300b5fdfe28c6edae926926f9467a27cf5889c , < 53baa63a4183291574483f89583dbef13677a2c4 (git) Affected: 97300b5fdfe28c6edae926926f9467a27cf5889c , < 2a613bf497029d555a7428406aa8cdb84a503cea (git) Affected: 97300b5fdfe28c6edae926926f9467a27cf5889c , < b2eb8886200b907fc71806869620609f0f4cacb0 (git) Affected: 97300b5fdfe28c6edae926926f9467a27cf5889c , < 4203806f700bb44ea0b05d484d9d40044b47fb04 (git) Affected: 97300b5fdfe28c6edae926926f9467a27cf5889c , < 087dbacf897c020f438f780f0a4a8aa73b6d7c5a (git) Affected: 97300b5fdfe28c6edae926926f9467a27cf5889c , < 791c91dc7a9dfb2457d5e29b8216a6484b9c4b40 (git)
Linux	Linux	Affected: 2.6.15 Unaffected: 0 , < 2.6.15 (semver) Unaffected: 5.10.269 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)

Show details on NVD website

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              "status": "unaffected",
              "version": "6.12.94",
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "*",
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              "version": "7.1",
              "versionType": "original_commit_for_fix"
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                  "vulnerable": true
                },
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                  "versionStartIncluding": "2.6.15",
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: Fix use-after-free when processing MLD queries\n\nWhen processing an MLD query, a pointer to the multicast group address\nis retrieved when initially parsing the packet. This pointer is later\ndereferenced without being reloaded despite the fact that the skb header\nmight have been reallocated following the pskb_may_pull() calls, leading\nto a use-after-free [1].\n\nFix by copying the multicast group address when the packet is initially\nparsed.\n\n[1]\nBUG: KASAN: slab-use-after-free in __mld_query_work (net/ipv6/mcast.c:1512)\nRead of size 8 at addr ffff8881154b8e90 by task kworker/4:1/118\n\nWorkqueue: mld mld_query_work\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)\nprint_address_description.constprop.0 (mm/kasan/report.c:378)\nprint_report (mm/kasan/report.c:482)\nkasan_report (mm/kasan/report.c:595)\n__mld_query_work (net/ipv6/mcast.c:1512)\nmld_query_work (net/ipv6/mcast.c:1563)\nprocess_one_work (kernel/workqueue.c:3314)\nworker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)\nkthread (kernel/kthread.c:436)\nret_from_fork (arch/x86/kernel/process.c:158)\nret_from_fork_asm (arch/x86/entry/entry_64.S:245)\n\u003c/TASK\u003e\n\n[...]\n\nFreed by task 118:\nkasan_save_stack (mm/kasan/common.c:57)\nkasan_save_track (mm/kasan/common.c:78)\nkasan_save_free_info (mm/kasan/generic.c:584)\n__kasan_slab_free (mm/kasan/common.c:253 mm/kasan/common.c:285)\nkfree (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6251 mm/slub.c:6566)\npskb_expand_head (net/core/skbuff.c:2335)\n__pskb_pull_tail (net/core/skbuff.c:2878 (discriminator 4))\n__mld_query_work (net/ipv6/mcast.c:1495 (discriminator 1))\nmld_query_work (net/ipv6/mcast.c:1563)\nprocess_one_work (kernel/workqueue.c:3314)\nworker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)\nkthread (kernel/kthread.c:436)\nret_from_fork (arch/x86/kernel/process.c:158)\nret_from_fork_asm (arch/x86/entry/entry_64.S:245)"
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              "lang": "en",
              "value": "AV:A - The vulnerable MLD query handler is reached by received ICMPv6 MLD Query packets, but the code requires a link-local IPv6 source, Hop Limit 1, and the MLD Router Alert option, making the highest defensible reachability an adjacent same-link attacker.\nAC:L - The attacker controls the packet contents, MLDv2 source count, and packet layout needed to trigger the stale skb-header pointer after pskb_may_pull(); there is no victim-controlled race or authentication-dependent state.\nPR:N - No local privileges or authentication are required; any adjacent network peer able to send crafted IPv6 MLD queries to the host can reach igmp6_event_query() and the queued mld_query_work path.\nUI:N - Exploitation is triggered by packet reception and asynchronous kernel workqueue processing without any required victim user action.\nS:U - The bug is in the host kernel IPv6 multicast listener processing and impacts the same kernel security authority, with no VM, IOMMU, or separate-scope boundary crossed.\nC:H - This is a use-after-free in kernel networking code; under the required conservative kernel guidance, UAFs are treated as capable of enabling high-impact information disclosure.\nI:H - Although the immediate stale access is a freed-memory read used in address comparison, it is still a kernel UAF and must be scored conservatively as potentially exploitable for memory corruption/control-flow impact.\nA:H - The commit includes a KASAN-confirmed slab-use-after-free in __mld_query_work(), and kernel UAFs can cause oops/panic or repeated denial of service."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/53baa63a4183291574483f89583dbef13677a2c4"
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          "url": "https://git.kernel.org/stable/c/2a613bf497029d555a7428406aa8cdb84a503cea"
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          "url": "https://git.kernel.org/stable/c/791c91dc7a9dfb2457d5e29b8216a6484b9c4b40"
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CVE-2026-53366 (GCVE-0-2026-53366)

Vulnerability from cvelistv5 – Published: 2026-07-16 05:13 – Updated: 2026-08-17 04:50

Title

ipv4: account for fraggap on the paged allocation path

Summary

In the Linux kernel, the following vulnerability has been resolved: ipv4: account for fraggap on the paged allocation path In __ip_append_data(), when the paged-allocation branch is taken, alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen; datalen already includes fraggap, but the fraggap bytes carried over from the previous skb are copied into the new skb's linear area at offset transhdrlen by the subsequent skb_copy_and_csum_bits(). The linear area is therefore undersized by fraggap bytes while pagedlen is overstated by the same amount. The non-paged branch sets alloclen to fraglen, which already accounts for fraggap because datalen does. Bring the paged branch in line by adding fraggap to alloclen and subtracting it from pagedlen. After this adjustment, copy no longer collapses to -fraggap on the paged path, so remove the stale comment describing that old arithmetic.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/5c6375bced6147ec2…
https://git.kernel.org/stable/c/ce494707a9c07f27c…
https://git.kernel.org/stable/c/a9c24eda24bd15f43…
https://git.kernel.org/stable/c/77798d7be6ef71e72…
https://git.kernel.org/stable/c/c04d9ece23deb9e26…
https://git.kernel.org/stable/c/eca856950f7cb1a22…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < 5c6375bced6147ec2e460ee3b653f4860d5ecdc2 (git) Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < ce494707a9c07f27c219ca67f3e138061f53d9b3 (git) Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < a9c24eda24bd15f432e37824e6fc440977cb241c (git) Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < 77798d7be6ef71e72fb6fc8a2901bf74ebc9706f (git) Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < c04d9ece23deb9e26c19f9ca215e98b3295aa1bb (git) Affected: 8eb77cc73977d88787b37c92831b1c242e035396 , < eca856950f7cb1a221e02b99d758409f2c5cec42 (git)
Linux	Linux	Affected: 6.0 Unaffected: 0 , < 6.0 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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JSON

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{
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: account for fraggap on the paged allocation path\n\nIn __ip_append_data(), when the paged-allocation branch is taken,\nalloclen and pagedlen are computed as\n\n\talloclen = fragheaderlen + transhdrlen;\n\tpagedlen = datalen - transhdrlen;\n\ndatalen already includes fraggap, but the fraggap bytes carried over\nfrom the previous skb are copied into the new skb\u0027s linear area at\noffset transhdrlen by the subsequent skb_copy_and_csum_bits(). The\nlinear area is therefore undersized by fraggap bytes while pagedlen is\noverstated by the same amount.\n\nThe non-paged branch sets alloclen to fraglen, which already accounts\nfor fraggap because datalen does. Bring the paged branch in line by\nadding fraggap to alloclen and subtracting it from pagedlen.\n\nAfter this adjustment, copy no longer collapses to -fraggap on the\npaged path, so remove the stale comment describing that old arithmetic."
        }
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            "baseSeverity": "HIGH",
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              "lang": "en",
              "value": "AV:L - The vulnerable code is reached while a local process constructs outgoing IPv4 UDP/raw/ping datagrams through sendmsg/splice/sendfile-style socket paths. I did not find a defensible received-packet or unauthenticated remote path that supplies the required cork/MSG_MORE-style fraggap conditions.\nAC:L - The attacker can choose UDP socket options/flags, payload sizes, corking/MSG_MORE behavior, and splice/zerocopy-style paged sends to reach the fraggap paged-allocation path. There is no race or external timing condition required.\nPR:L - A normal unprivileged local user can create IPv4 UDP sockets and use UDP_CORK/MSG_MORE/splice or related paged send paths; raw sockets are CAP_NET_RAW-gated but are not needed for the strongest local trigger. This is therefore basic local user privilege, not real administrator privilege.\nUI:N - No victim interaction is required once the attacker can run the local send/splice sequence. The vulnerable skb construction happens synchronously in the attacker-driven socket send path.\nS:U - The impact is within the same kernel security authority as the vulnerable IPv4 networking code. This is not a VM escape, IOMMU bypass, or cross-authority boundary violation.\nC:H - The bug under-allocates/accounting for the linear skb area and can copy attacker-controlled fraggap bytes past skb-\u003eend into trailing skb_shared_info metadata. Kernel memory corruption of this kind is reasonably capable of being developed into information disclosure, so the higher severity confidentiality value is appropriate.\nI:H - The copied fraggap bytes corrupt kernel skb metadata past the intended buffer boundary. This is an out-of-bounds write in kernel heap/networking structures and is scored as high integrity impact.\nA:H - The corrupted skb metadata can crash or destabilize the kernel networking stack, and related negative-copy accounting can also produce severe send-path failure behavior. Kernel crash or oops potential is high availability impact."
            }
          ]
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:50:30.453Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/5c6375bced6147ec2e460ee3b653f4860d5ecdc2"
        },
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          "url": "https://git.kernel.org/stable/c/ce494707a9c07f27c219ca67f3e138061f53d9b3"
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        {
          "url": "https://git.kernel.org/stable/c/eca856950f7cb1a221e02b99d758409f2c5cec42"
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      "title": "ipv4: account for fraggap on the paged allocation path",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53366",
    "datePublished": "2026-07-16T05:13:40.893Z",
    "dateReserved": "2026-06-09T07:44:35.400Z",
    "dateUpdated": "2026-08-17T04:50:30.453Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-64034 (GCVE-0-2026-64034)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-08-05 12:38

Title

net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer

Summary

In the Linux kernel, the following vulnerability has been resolved: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer In mana_hwc_rx_event_handler(), resp->response.hwc_msg_id is read from DMA-coherent memory and bounds-checked, then mana_hwc_handle_resp() re-reads the same field from the same DMA buffer for test_bit() and pointer arithmetic. DMA-coherent memory is mapped uncacheable on x86 and is shared, unencrypted, in Confidential VMs (SEV-SNP/TDX), so each load goes directly to host-visible memory. A H/W can modify the value between the check and the use, bypassing the bounds validation. Fix this by reading hwc_msg_id exactly once using READ_ONCE() into a stack-local variable in mana_hwc_rx_event_handler(), and passing the validated value as a parameter to mana_hwc_handle_resp().

Severity

9.3 (Critical)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/a201c66edf2ebc6cf…
https://git.kernel.org/stable/c/70ad2dff8d052a85d…
https://git.kernel.org/stable/c/566f42fb67a7ebfed…
https://git.kernel.org/stable/c/6180a06bbc99fd911…
https://git.kernel.org/stable/c/09ec063d87c2dd3fa…
https://git.kernel.org/stable/c/3c4db56ccd13dd020…
https://git.kernel.org/stable/c/35f0f0a2536a4d604…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < a201c66edf2ebc6cfdc3813a889ba20fecebfae3 (git) Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < 70ad2dff8d052a85dfef15715b531f38a29108cf (git) Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < 566f42fb67a7ebfed6650e407e5b72e6b3e83bf7 (git) Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < 6180a06bbc99fd9114b8db4be6c4d46e40f046ef (git) Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < 09ec063d87c2dd3fa6f3561361a017bd882e9f37 (git) Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < 3c4db56ccd13dd020fbf43afabaee74a40ec75e4 (git) Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < 35f0f0a2536a4d604b4dbad92c85c4a8fdebb870 (git)
Linux	Linux	Affected: 5.13 Unaffected: 0 , < 5.13 (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.142 , ≤ 6.6.* (semver) Unaffected: 6.12.92 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer\n\nIn mana_hwc_rx_event_handler(), resp-\u003eresponse.hwc_msg_id is read from\nDMA-coherent memory and bounds-checked, then mana_hwc_handle_resp()\nre-reads the same field from the same DMA buffer for test_bit() and\npointer arithmetic.\n\nDMA-coherent memory is mapped uncacheable on x86 and is shared,\nunencrypted, in Confidential VMs (SEV-SNP/TDX), so each load goes\ndirectly to host-visible memory. A H/W can modify the value\nbetween the check and the use, bypassing the bounds validation.\n\nFix this by reading hwc_msg_id exactly once using READ_ONCE() into a\nstack-local variable in mana_hwc_rx_event_handler(), and passing the\nvalidated value as a parameter to mana_hwc_handle_resp()."
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              "value": "AV:L - Exploitation requires a malicious hypervisor or host that can modify MANA HWC DMA-coherent response buffers between guest kernel loads; it is not reachable by sending network packets to the guest\u0027s data path.\nAC:L - The attacker controlling the hypervisor fully controls DMA buffer contents and can reliably flip hwc_msg_id between the validation read and the use in mana_hwc_handle_resp() on uncacheable coherent memory.\nPR:N - The attacking hypervisor needs no guest OS credentials or capabilities; exploitation targets the guest kernel through the virtual device DMA path while the MANA driver is active.\nUI:N - No victim user action is required beyond normal Azure VM operation with the MANA driver loaded and HWC receive buffers posted.\nS:C - The vulnerability crosses the VM/DMA security boundary by allowing a hostile hypervisor to corrupt guest kernel memory that the confidential-guest threat model assumes is protected from host tampering.\nC:H - Out-of-bounds indexing via bypassed hwc_msg_id validation enables reading adjacent kernel heap objects through misdirected caller_ctx access and test_bit() on the inflight bitmap.\nI:H - Host-controlled response data is copied with memcpy() to an out-of-bounds output_buf pointer, enabling arbitrary kernel memory corruption and potential control-flow hijacking.\nA:H - Out-of-bounds caller_ctx access and corrupted completion signaling can cause kernel oops, panic, or hang during HWC response handling."
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      "title": "net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer",
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CVE-2026-64563 (GCVE-0-2026-64563)

Vulnerability from cvelistv5 – Published: 2026-08-04 06:23 – Updated: 2026-08-19 16:28

Title

rhashtable: clear stale iter->p on table restart

Summary

In the Linux kernel, the following vulnerability has been resolved: rhashtable: clear stale iter->p on table restart rhashtable_walk_start_check() has two restart paths when resuming a walk. When iter->walker.tbl is valid, it re-validates iter->p against the table and sets iter->p = NULL if the object is gone. When iter->walker.tbl is NULL (table was freed during resize), it resets slot and skip but forgets to clear iter->p. rhashtable_walk_next() then dereferences the stale iter->p, reading freed memory. This is a use-after-free. Any caller that does multi-fragment rhashtable walks across walk_stop/walk_start boundaries is affected. Concrete cases include netlink_diag (__netlink_diag_dump in net/netlink/diag.c) and TIPC (tipc_nl_sk_walk in net/tipc/socket.c). Crash stack (netlink_diag): BUG: KASAN: slab-use-after-free in rhashtable_walk_next+0x365/0x3c0 Read of size 8 at addr ffff88801a9d2438 (freed kmalloc-2k, offset 1080) Call Trace: rhashtable_walk_next+0x365/0x3c0 (lib/rhashtable.c:1016) __netlink_diag_dump+0x160/0x760 (net/netlink/diag.c:122) netlink_diag_dump+0xc2/0x240 netlink_dump+0x5bc/0x1270 netlink_recvmsg+0x7a3/0x980 sock_recvmsg+0x1bc/0x200 __sys_recvfrom+0x1d4/0x2c0

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/ba510b5e9fe396497…
https://git.kernel.org/stable/c/a0406c40c6638c5ae…
https://git.kernel.org/stable/c/0955b65c2b47c30b4…
https://git.kernel.org/stable/c/c39643ad99fea749b…
https://git.kernel.org/stable/c/042fda5c088015f18…
https://git.kernel.org/stable/c/3ff7c1dbf722cf3fa…
https://git.kernel.org/stable/c/4169d9fb92f313ff8…
https://git.kernel.org/stable/c/8173f7e2ce67e6ca1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < ba510b5e9fe396497d31162acb579f210adfe6c8 (git) Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < a0406c40c6638c5ae50257db6297b2fba6c9ba16 (git) Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 0955b65c2b47c30b439e2cf1b1e375073aa0413a (git) Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < c39643ad99fea749be50615550e8f0e6d6e60694 (git) Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 042fda5c088015f18838e5c692659a7be60aeb26 (git) Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 3ff7c1dbf722cf3fa538672452ba182318e0fcc3 (git) Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 4169d9fb92f313ff8e7e83d733c1ecdcc93eebd3 (git) Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 8173f7e2ce67e6ca1d4763f3da14e5b01ce77456 (git)
Linux	Linux	Affected: 4.18 Unaffected: 0 , < 4.18 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.151 , ≤ 6.6.* (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrhashtable: clear stale iter-\u003ep on table restart\n\nrhashtable_walk_start_check() has two restart paths when resuming a walk.\nWhen iter-\u003ewalker.tbl is valid, it re-validates iter-\u003ep against the table\nand sets iter-\u003ep = NULL if the object is gone.  When iter-\u003ewalker.tbl is\nNULL (table was freed during resize), it resets slot and skip but forgets\nto clear iter-\u003ep.\n\nrhashtable_walk_next() then dereferences the stale iter-\u003ep, reading\nfreed memory.  This is a use-after-free.\n\nAny caller that does multi-fragment rhashtable walks across\nwalk_stop/walk_start boundaries is affected.  Concrete cases include\nnetlink_diag (__netlink_diag_dump in net/netlink/diag.c) and TIPC\n(tipc_nl_sk_walk in net/tipc/socket.c).\n\nCrash stack (netlink_diag):\n  BUG: KASAN: slab-use-after-free in rhashtable_walk_next+0x365/0x3c0\n  Read of size 8 at addr ffff88801a9d2438 (freed kmalloc-2k, offset 1080)\n  Call Trace:\n   rhashtable_walk_next+0x365/0x3c0 (lib/rhashtable.c:1016)\n   __netlink_diag_dump+0x160/0x760 (net/netlink/diag.c:122)\n   netlink_diag_dump+0xc2/0x240\n   netlink_dump+0x5bc/0x1270\n   netlink_recvmsg+0x7a3/0x980\n   sock_recvmsg+0x1bc/0x200\n   __sys_recvfrom+0x1d4/0x2c0"
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              "lang": "en",
              "value": "AV:L - Triggered via local netlink sock_diag dumps (e.g. netlink_diag over NETLINK_SOCK_DIAG) and similar local dump walkers such as TIPC_NL_SOCK_GET; not reachable from remote packet processing.\nAC:L - Attacker controls both sides of the race by running a multi-fragment rhashtable dump while concurrently creating/destroying netlink (or TIPC) sockets to force table resize and free the walked object.\nPR:L - An unprivileged local user can open NETLINK_SOCK_DIAG and dump without CAP_NET_ADMIN; CAP_NET_ADMIN is only required for SOCK_DESTROY, and TIPC_NL_SOCK_GET likewise has no admin permission flag.\nUI:N - Exploitation requires only attacker-issued syscalls (netlink dump plus concurrent socket churn); no victim action is needed.\nS:U - Impact is memory corruption within the host kernel authority (local privilege escalation/crash), not a cross-boundary escape such as guest-to-host or IOMMU bypass.\nC:H - Use-after-free read of a freed hashed object (e.g. netlink_sock) can be reclaimed via heap spray, yielding an arbitrary read primitive through subsequent walk/diag use of the corrupted pointer.\nI:H - UAF on a reclaimable slab object enables heap spraying and fake-object injection into the walk path, which can be leveraged for arbitrary write or control-flow hijacking.\nA:H - The demonstrated KASAN slab-use-after-free in rhashtable_walk_next can oops/panic the kernel, and UAFs remain crashable even when not fully exploited."
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        "dateUpdated": "2026-08-19T16:28:34.797Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        {
          "url": "https://git.kernel.org/stable/c/0955b65c2b47c30b439e2cf1b1e375073aa0413a"
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          "url": "https://git.kernel.org/stable/c/c39643ad99fea749be50615550e8f0e6d6e60694"
        },
        {
          "url": "https://git.kernel.org/stable/c/042fda5c088015f18838e5c692659a7be60aeb26"
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        {
          "url": "https://git.kernel.org/stable/c/3ff7c1dbf722cf3fa538672452ba182318e0fcc3"
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/8173f7e2ce67e6ca1d4763f3da14e5b01ce77456"
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      "title": "rhashtable: clear stale iter-\u003ep on table restart",
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    "cveId": "CVE-2026-64563",
    "datePublished": "2026-08-04T06:23:22.601Z",
    "dateReserved": "2026-07-19T15:36:31.797Z",
    "dateUpdated": "2026-08-19T16:28:34.797Z",
    "state": "PUBLISHED"
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}

CVE-2026-64597 (GCVE-0-2026-64597)

Vulnerability from cvelistv5 – Published: 2026-08-06 07:13 – Updated: 2026-08-17 04:58

Title

smb: client: fix double-free in SMB2_close() replay

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_close() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_close_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/037511726228aaf16…
https://git.kernel.org/stable/c/0aa97edf7c347c0f5…
https://git.kernel.org/stable/c/d15d83125007f673a…
https://git.kernel.org/stable/c/b18ed621dbfceecea…
https://git.kernel.org/stable/c/f96e1cdcb63ed3321…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 433042a91f9373241307725b52de573933ffedbf , < 037511726228aaf165c7067ff2bfc88eaecdf1f3 (git) Affected: 4f1fffa2376922f3d1d506e49c0fd445b023a28e , < 0aa97edf7c347c0f54e7e60c4740574b8120c66a (git) Affected: 4f1fffa2376922f3d1d506e49c0fd445b023a28e , < d15d83125007f673aec4323e1bbbaaffbe87ea13 (git) Affected: 4f1fffa2376922f3d1d506e49c0fd445b023a28e , < b18ed621dbfceecea5539848cddcb9272c9a61e1 (git) Affected: 4f1fffa2376922f3d1d506e49c0fd445b023a28e , < f96e1cdcb63ed3321142ff2fcdf784e32cda8fee (git) Affected: 6.6.32 , < 6.6.145 (semver)
Linux	Linux	Affected: 6.8 Unaffected: 0 , < 6.8 (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2pdu.c"
          ],
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            }
          ]
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          ],
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double-free in SMB2_close() replay\n\nA response-bearing attempt can return a replayable error and free its\nresponse buffer. If SMB2_close_init() fails before the next send, cleanup\nretains the previous buffer type and frees that response again.\n\nReset response bookkeeping before each attempt to prevent the stale free."
        }
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              "lang": "en",
              "value": "AV:N - A malicious or compromised SMB server triggers the double-free via crafted SMB2 CLOSE responses over the network, returning replayable NTSTATUS values that map to -EAGAIN/-ECONNABORTED while leaving a response buffer for the client to free.\nAC:L - The attacking server controls both sides of the sequence by returning a replayable CLOSE status with a response buffer, then dropping or forcing reconnect so SMB2_close_init fails before the next send, and can repeat until the stale free occurs.\nPR:N - The attacking SMB endpoint needs no account or privileges on the victim client; once an SMB session and handle exist, the server alone drives the vulnerable CLOSE replay path.\nUI:N - On an already mounted or automounted share, background paths such as cached-directory close and cancelled-close work, as well as routine service file closes, can invoke SMB2_close without interactive user action at exploit time.\nS:U - The mempool double-free corrupts kernel memory within the same host kernel security authority and does not inherently cross a VM, IOMMU, or sandbox boundary.\nC:H - Double-free of a CIFS small/large response buffer can create overlapping live allocations and use-after-free reads, enabling disclosure of arbitrary kernel memory.\nI:H - Reallocation of the freed mempool object with attacker-controlled network data can corrupt live kernel objects or allocator metadata, enabling arbitrary writes and control-flow hijacking.\nA:H - The duplicate free can immediately trigger allocator BUG diagnostics, heap corruption, oops, or panic, and the server can retrigger the path repeatedly."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:58:19.742Z",
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        }
      ],
      "title": "smb: client: fix double-free in SMB2_close() replay",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64597",
    "datePublished": "2026-08-06T07:13:52.117Z",
    "dateReserved": "2026-07-19T15:36:31.799Z",
    "dateUpdated": "2026-08-17T04:58:19.742Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-72129 (GCVE-0-2026-72129)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:53 – Updated: 2026-08-17 05:40

Title

nvmet-rdma: handle inline data with a nonzero offset

Summary

In the Linux kernel, the following vulnerability has been resolved: nvmet-rdma: handle inline data with a nonzero offset nvmet_rdma_use_inline_sg() maps the host-controlled inline data offset into the per-command inline scatterlist. The bounds check admits any offset with off + len <= inline_data_size, but the mapping still assumes the data begins in the first inline page: sg->offset = off; sg->length = min_t(int, len, PAGE_SIZE - off); When a port is configured with inline_data_size > PAGE_SIZE (settable up to max(SZ_16K, PAGE_SIZE)), an offset in (PAGE_SIZE, inline_data_size] makes "PAGE_SIZE - off" underflow, so sg->length is set to ~4 GiB and the block backend reads far past the first inline page. num_pages(len) also ignores the offset, so an in-bounds offset whose [off, off+len) span crosses a page boundary under-counts the scatterlist. Map the offset properly: split it into a page index and an in-page offset, start the scatterlist at that page, and size the page count from page_off + len. Because the request scatterlist may now start at inline_sg[page_idx] rather than inline_sg[0], generalize the inline-SGL identity test in nvmet_rdma_release_rsp() to a range test; otherwise the persistent inline scatterlist is mistaken for an allocated one and nvmet_req_free_sgls() frees an inline page (and warns in free_large_kmalloc()).

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c2106ba1b14d644a5…
https://git.kernel.org/stable/c/bf8bcc1c137d54a62…
https://git.kernel.org/stable/c/11401371152b22844…
https://git.kernel.org/stable/c/7c96581169c9d9a7d…
https://git.kernel.org/stable/c/42a8ea3acd883f4f2…
https://git.kernel.org/stable/c/2944113ad5fbcdf5d…
https://git.kernel.org/stable/c/98bcdfa619150b2f4…
https://git.kernel.org/stable/c/48c0162f647bb47e6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349 , < c2106ba1b14d644a5203bea1a50dbe25dcad713c (git) Affected: 0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349 , < bf8bcc1c137d54a62a428b00051fdbb13660673b (git) Affected: 0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349 , < 11401371152b228448a41d79c6de1c938f93049a (git) Affected: 0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349 , < 7c96581169c9d9a7d0726e554313acfbead6141c (git) Affected: 0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349 , < 42a8ea3acd883f4f210d9e54e0975b1e2292b529 (git) Affected: 0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349 , < 2944113ad5fbcdf5d349d857c03d2a44b6de75b8 (git) Affected: 0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349 , < 98bcdfa619150b2f41fa15bac140dbaf2584ad05 (git) Affected: 0d5ee2b2ab4f6776c361bc975c2323bc8b5cf349 , < 48c0162f647bb47e6084ffbc71b8f213f5e2f4f8 (git)
Linux	Linux	Affected: 4.19 Unaffected: 0 , < 4.19 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "cna": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-rdma: handle inline data with a nonzero offset\n\nnvmet_rdma_use_inline_sg() maps the host-controlled inline data offset\ninto the per-command inline scatterlist.  The bounds check admits any\noffset with off + len \u003c= inline_data_size, but the mapping still assumes\nthe data begins in the first inline page:\n\n\tsg-\u003eoffset = off;\n\tsg-\u003elength = min_t(int, len, PAGE_SIZE - off);\n\nWhen a port is configured with inline_data_size \u003e PAGE_SIZE (settable up\nto max(SZ_16K, PAGE_SIZE)), an offset in (PAGE_SIZE, inline_data_size]\nmakes \"PAGE_SIZE - off\" underflow, so sg-\u003elength is set to ~4 GiB and\nthe block backend reads far past the first inline page.  num_pages(len)\nalso ignores the offset, so an in-bounds offset whose [off, off+len)\nspan crosses a page boundary under-counts the scatterlist.\n\nMap the offset properly: split it into a page index and an in-page\noffset, start the scatterlist at that page, and size the page count from\npage_off + len.  Because the request scatterlist may now start at\ninline_sg[page_idx] rather than inline_sg[0], generalize the inline-SGL\nidentity test in nvmet_rdma_release_rsp() to a range test; otherwise the\npersistent inline scatterlist is mistaken for an allocated one and\nnvmet_req_free_sgls() frees an inline page (and warns in\nfree_large_kmalloc())."
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              "value": "AV:N - nvmet-rdma is an in-kernel NVMe-oF target that processes NVMe commands and inline data from remote initiators over RDMA (RoCE/IB) via RDMA RECV completions, placing it in the same network-reachable class as nvmet-tcp and other remote fabric targets.\nAC:L - In deployments using inline_data_size above PAGE_SIZE (up to 16KB), a remote initiator fully controls the inline SGL offset and length in write commands and can deterministically trigger the integer underflow and multi-gigabyte scatterlist length without races or victim-specific timing.\nPR:N - Exploitation requires only remote NVMe-oF RDMA connectivity to a configured target subsystem; no local UNIX privileges or Linux capabilities on the victim host are needed, and the vulnerable recv/command path is reachable before or without mandatory DH-HMAC-CHAP on I/O queues.\nUI:N - Triggering the bug requires only sending crafted NVMe write commands with malicious inline SGL offsets over an established RDMA connection; no end-user actions such as mounting filesystems or opening files are required.\nS:U - The vulnerability corrupts kernel heap memory and backing storage on the NVMe target host itself; it does not cross a VM, container, or IOMMU security boundary to impact a separate security authority.\nC:H - The integer underflow sets scatterlist entries to ~4 GiB, causing the block backend to read far beyond the inline DMA buffer pages into adjacent kernel memory, and the erroneous sgl_free of inline pages creates use-after-free conditions enabling further information disclosure.\nI:H - Out-of-bounds kernel memory is incorporated into block write bios corrupting exported backing storage, and the erroneous freeing of inline scatterlist pages enables heap corruption primitives that can be leveraged for arbitrary memory writes or control-flow hijacking.\nA:H - Out-of-bounds access from multi-gigabyte scatterlist lengths, warnings from free_large_kmalloc() on freed inline pages, and nvmet fatal error handling can cause kernel oops, hung I/O, or panic on the storage target."
            }
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        "dateUpdated": "2026-08-17T05:40:41.114Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/c2106ba1b14d644a5203bea1a50dbe25dcad713c"
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        },
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          "url": "https://git.kernel.org/stable/c/98bcdfa619150b2f41fa15bac140dbaf2584ad05"
        },
        {
          "url": "https://git.kernel.org/stable/c/48c0162f647bb47e6084ffbc71b8f213f5e2f4f8"
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      "title": "nvmet-rdma: handle inline data with a nonzero offset",
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    "assignerShortName": "Linux",
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    "datePublished": "2026-08-15T05:53:05.874Z",
    "dateReserved": "2026-08-09T03:40:39.907Z",
    "dateUpdated": "2026-08-17T05:40:41.114Z",
    "state": "PUBLISHED"
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CVE-2026-74480 (GCVE-0-2026-74480)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:37

Title

net: bridge: stop fast-leave after deleting a port group

Summary

In the Linux kernel, the following vulnerability has been resolved: net: bridge: stop fast-leave after deleting a port group br_multicast_leave_group() iterates mp->ports with pp = &p->next in its fast-leave path. After br_multicast_del_pg() removes p, continuing the loop advances pp through the deleted entry. If multicast-to-unicast was enabled, the bridge can hold multiple port groups for the same port and group with different source MAC addresses. Once multicast-to-unicast is disabled, br_port_group_equal() matches those entries by port only. A fast leave can then delete one entry and continue from its stale next pointer, leaving mp->ports pointing at a deleted port group. Fast leave only needs to remove one matching port group. Break after br_multicast_del_pg() so the loop stops before dereferencing the removed entry.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/d6c32e2e25a9a06ba…
https://git.kernel.org/stable/c/482bcb85139addb4e…
https://git.kernel.org/stable/c/1a109cc9890d017c4…
https://git.kernel.org/stable/c/159ad90cb929c0333…
https://git.kernel.org/stable/c/4695430e8132420bf…
https://git.kernel.org/stable/c/0309ebbc570000ea0…
https://git.kernel.org/stable/c/4c57056ca6aace2e9…
https://git.kernel.org/stable/c/a39789f211b8a4125…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6db6f0eae6052b70885562e1733896647ec1d807 , < d6c32e2e25a9a06ba021030e26b6d602a277eb72 (git) Affected: 6db6f0eae6052b70885562e1733896647ec1d807 , < 482bcb85139addb4e8ac8ed10baeda3e0aad4031 (git) Affected: 6db6f0eae6052b70885562e1733896647ec1d807 , < 1a109cc9890d017c41d77e6c82da739579c49f0b (git) Affected: 6db6f0eae6052b70885562e1733896647ec1d807 , < 159ad90cb929c033308bb39a2c5f8fbf393b77aa (git) Affected: 6db6f0eae6052b70885562e1733896647ec1d807 , < 4695430e8132420bf8de94da3eb36a6cf35fde6b (git) Affected: 6db6f0eae6052b70885562e1733896647ec1d807 , < 0309ebbc570000ea0df11c06b69798e5860c5f6f (git) Affected: 6db6f0eae6052b70885562e1733896647ec1d807 , < 4c57056ca6aace2e9f94ae9298bf49ef6b0c95e4 (git) Affected: 6db6f0eae6052b70885562e1733896647ec1d807 , < a39789f211b8a4125f0c70e05b30cf715f4f187d (git)
Linux	Linux	Affected: 4.11 Unaffected: 0 , < 4.11 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.151 , ≤ 6.6.* (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bridge/br_multicast.c"
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            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.265",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.151",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.103",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.8",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: stop fast-leave after deleting a port group\n\nbr_multicast_leave_group() iterates mp-\u003eports with pp = \u0026p-\u003enext in\nits fast-leave path. After br_multicast_del_pg() removes p,\ncontinuing the loop advances pp through the deleted entry.\n\nIf multicast-to-unicast was enabled, the bridge can hold multiple port\ngroups for the same port and group with different source MAC\naddresses. Once multicast-to-unicast is disabled,\nbr_port_group_equal() matches those entries by port only. A fast leave\ncan then delete one entry and continue from its stale next pointer,\nleaving mp-\u003eports pointing at a deleted port group.\n\nFast leave only needs to remove one matching port group. Break after\nbr_multicast_del_pg() so the loop stops before dereferencing the\nremoved entry."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The bug is reached when the bridge network stack processes attacker-supplied IGMP/MLD Leave packets received on a bridge port (br_handle_frame_finish -\u003e br_multicast_rcv -\u003e br_ip4/ip6_multicast_leave_group -\u003e br_multicast_leave_group), requiring no local syscall access.\nAC:L - Once a bridge has IGMP snooping, fast-leave, and leftover duplicate port groups (common on WiFi APs that used multicast-to-unicast), an attacker can reliably trigger the bug by sending IGMP/MLD joins then a Leave; no uncontrollable race or rare timing is required.\nPR:N - No privileges or authentication are required on the target; any host on an attached bridge port can inject IGMP/MLD Leave packets that are processed and reach the vulnerable fast-leave deletion loop.\nUI:N - Exploitation requires only attacker-sent multicast control packets; no victim user action such as opening files, clicking links, or mounting filesystems is needed.\nS:U - Impact is kernel heap corruption and use-after-free within the bridge/multicast subsystem on the same host; it does not cross a VM/hypervisor or IOMMU security boundary by itself.\nC:H - Deleting a port group then continuing the list walk dereferences freed net_bridge_port_group memory and can leave mp-\u003eports dangling, giving a use-after-free read primitive exploitable for arbitrary kernel memory disclosure.\nI:H - Corrupting the mp-\u003eports linked list via stale next pointers after br_multicast_del_pg() enables attacker-influenced kernel heap corruption that can be developed into arbitrary write and privilege escalation.\nA:H - The use-after-free and corrupted multicast database pointers cause kernel oops/panics when subsequent bridge multicast forwarding or MDB operations traverse the broken port-group list, enabling repeatable denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:37:33.031Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d6c32e2e25a9a06ba021030e26b6d602a277eb72"
        },
        {
          "url": "https://git.kernel.org/stable/c/482bcb85139addb4e8ac8ed10baeda3e0aad4031"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a109cc9890d017c41d77e6c82da739579c49f0b"
        },
        {
          "url": "https://git.kernel.org/stable/c/159ad90cb929c033308bb39a2c5f8fbf393b77aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/4695430e8132420bf8de94da3eb36a6cf35fde6b"
        },
        {
          "url": "https://git.kernel.org/stable/c/0309ebbc570000ea0df11c06b69798e5860c5f6f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4c57056ca6aace2e9f94ae9298bf49ef6b0c95e4"
        },
        {
          "url": "https://git.kernel.org/stable/c/a39789f211b8a4125f0c70e05b30cf715f4f187d"
        }
      ],
      "title": "net: bridge: stop fast-leave after deleting a port group",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74480",
    "datePublished": "2026-08-15T12:27:13.803Z",
    "dateReserved": "2026-08-15T05:44:03.904Z",
    "dateUpdated": "2026-08-19T16:37:33.031Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

alsa-2026:66180

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CVE-2026-64597 (GCVE-0-2026-64597)

CVE-2026-72129 (GCVE-0-2026-72129)

CVE-2026-74480 (GCVE-0-2026-74480)

Tags

Sightings

Nomenclature

Related by attack behaviour