Vulnerability-Lookup

alsa-2026:36541

Vulnerability from osv_almalinux

Published

2026-07-08 00:00

Modified

2026-07-09 11:20

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: eventpoll: defer struct eventpoll free to RCU grace period (CVE-2026-43074)
kernel: net: mana: Fix double destroy_workqueue on service rescan PCI path (CVE-2026-43276)
kernel: net/ipv6: ioam6: prevent schema length wraparound in trace fill (CVE-2026-43341)
kernel: smb/client: fix out-of-bounds read in smb2_compound_op() (CVE-2026-46155)
kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF (CVE-2026-46242)
kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat() (CVE-2026-46259)

Bug Fix(es) and Enhancement(s):

CNB103: net: page_pool: avoid false positive warning if NAPI was never added [almalinux-10.2.z] (JIRA:AlmaLinux-162140)
[AlmaLinux 10] Bonding reports unknown speed/duplex for tg3 interface [almalinux-10.2.z] (JIRA:AlmaLinux-182770)

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-2026:36541	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-43074	REPORT
	https://access.redhat.com/security/cve/CVE-2026-43276	REPORT
	https://access.redhat.com/security/cve/CVE-2026-43341	REPORT
	https://access.redhat.com/security/cve/CVE-2026-46155	REPORT
	https://access.redhat.com/security/cve/CVE-2026-46242	REPORT
	https://access.redhat.com/security/cve/CVE-2026-46259	REPORT
	https://bugzilla.redhat.com/2467019	REPORT
	https://bugzilla.redhat.com/2467113	REPORT
	https://bugzilla.redhat.com/2468097	REPORT
	https://bugzilla.redhat.com/2482660	REPORT
	https://bugzilla.redhat.com/2483519	REPORT
	https://bugzilla.redhat.com/2484477	REPORT
	https://errata.almalinux.org/10/ALSA-2026-36541.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: eventpoll: defer struct eventpoll free to RCU grace period (CVE-2026-43074)\n  * kernel: net: mana: Fix double destroy_workqueue on service rescan PCI path (CVE-2026-43276)\n  * kernel: net/ipv6: ioam6: prevent schema length wraparound in trace fill (CVE-2026-43341)\n  * kernel: smb/client: fix out-of-bounds read in smb2_compound_op() (CVE-2026-46155)\n  * kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF (CVE-2026-46242)\n  * kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat() (CVE-2026-46259)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * CNB103: net: page_pool: avoid false positive warning if NAPI was never added [almalinux-10.2.z] (JIRA:AlmaLinux-162140)\n  * [AlmaLinux 10] Bonding reports unknown speed/duplex for tg3 interface [almalinux-10.2.z] (JIRA:AlmaLinux-182770)\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-2026:36541",
  "modified": "2026-07-09T11:20:20Z",
  "published": "2026-07-08T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:36541"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-43074"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-43276"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-43341"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-46155"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-46242"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-46259"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2467019"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2467113"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2468097"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2482660"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2483519"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2484477"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-36541.html"
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  ],
  "related": [
    "CVE-2026-43074",
    "CVE-2026-43276",
    "CVE-2026-43341",
    "CVE-2026-46155",
    "CVE-2026-46242",
    "CVE-2026-46259"
  ],
  "summary": "Important: kernel security, bug fix, and enhancement update"
}

CVE-2026-43074 (GCVE-0-2026-43074)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:21 – Updated: 2026-06-01 16:14

Title

eventpoll: defer struct eventpoll free to RCU grace period

Summary

In the Linux kernel, the following vulnerability has been resolved: eventpoll: defer struct eventpoll free to RCU grace period In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while it still being used by another concurrent thread. Defer the kfree() to an RCU callback to prevent UAF.

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

References

7 references

URL	Tags
https://git.kernel.org/stable/c/902120be4f44947df…
https://git.kernel.org/stable/c/a6d57084372161f86…
https://git.kernel.org/stable/c/a6566cd33f6f967a7…
https://git.kernel.org/stable/c/5b1173b165421561d…
https://git.kernel.org/stable/c/7e8083f5eeedab0f4…
https://git.kernel.org/stable/c/ae0bb9c1fb7c25945…
https://git.kernel.org/stable/c/07712db80857d5d09…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f2451def095c1743adcfcb0cb5dadc86034e162a , < 902120be4f44947df6311002addc7faf69bdbff1 (git) Affected: a1f93804449d13f97dabd4b996817de4bf1ed67a , < a6d57084372161f86660bc4607784420e00efe2c (git) Affected: 58c9b016e12855286370dfb704c08498edbc857a , < a6566cd33f6f967a7651ebf2ce0dd31572e319cf (git) Affected: 58c9b016e12855286370dfb704c08498edbc857a , < 5b1173b165421561db29f30afc7e97d940a398a9 (git) Affected: 58c9b016e12855286370dfb704c08498edbc857a , < 7e8083f5eeedab0f460063b9c2c14c9a4e71a427 (git) Affected: 58c9b016e12855286370dfb704c08498edbc857a , < ae0bb9c1fb7c2594519aeeb096cf2c3b7837b322 (git) Affected: 58c9b016e12855286370dfb704c08498edbc857a , < 07712db80857d5d09ae08f3df85a708ecfc3b61f (git)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.136 , ≤ 6.6.* (semver) Unaffected: 6.12.83 , ≤ 6.12.* (semver) Unaffected: 6.18.24 , ≤ 6.18.* (semver) Unaffected: 6.19.14 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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CVE-2026-43276 (GCVE-0-2026-43276)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-11 22:21

Title

net: mana: Fix double destroy_workqueue on service rescan PCI path

Summary

In the Linux kernel, the following vulnerability has been resolved: net: mana: Fix double destroy_workqueue on service rescan PCI path While testing corner cases in the driver, a use-after-free crash was found on the service rescan PCI path. When mana_serv_reset() calls mana_gd_suspend(), mana_gd_cleanup() destroys gc->service_wq. If the subsequent mana_gd_resume() fails with -ETIMEDOUT or -EPROTO, the code falls through to mana_serv_rescan() which triggers pci_stop_and_remove_bus_device(). This invokes the PCI .remove callback (mana_gd_remove), which calls mana_gd_cleanup() a second time, attempting to destroy the already- freed workqueue. Fix this by NULL-checking gc->service_wq in mana_gd_cleanup() and setting it to NULL after destruction. Call stack of issue for reference: [Sat Feb 21 18:53:48 2026] Call Trace: [Sat Feb 21 18:53:48 2026] <TASK> [Sat Feb 21 18:53:48 2026] mana_gd_cleanup+0x33/0x70 [mana] [Sat Feb 21 18:53:48 2026] mana_gd_remove+0x3a/0xc0 [mana] [Sat Feb 21 18:53:48 2026] pci_device_remove+0x41/0xb0 [Sat Feb 21 18:53:48 2026] device_remove+0x46/0x70 [Sat Feb 21 18:53:48 2026] device_release_driver_internal+0x1e3/0x250 [Sat Feb 21 18:53:48 2026] device_release_driver+0x12/0x20 [Sat Feb 21 18:53:48 2026] pci_stop_bus_device+0x6a/0x90 [Sat Feb 21 18:53:48 2026] pci_stop_and_remove_bus_device+0x13/0x30 [Sat Feb 21 18:53:48 2026] mana_do_service+0x180/0x290 [mana] [Sat Feb 21 18:53:48 2026] mana_serv_func+0x24/0x50 [mana] [Sat Feb 21 18:53:48 2026] process_one_work+0x190/0x3d0 [Sat Feb 21 18:53:48 2026] worker_thread+0x16e/0x2e0 [Sat Feb 21 18:53:48 2026] kthread+0xf7/0x130 [Sat Feb 21 18:53:48 2026] ? __pfx_worker_thread+0x10/0x10 [Sat Feb 21 18:53:48 2026] ? __pfx_kthread+0x10/0x10 [Sat Feb 21 18:53:48 2026] ret_from_fork+0x269/0x350 [Sat Feb 21 18:53:48 2026] ? __pfx_kthread+0x10/0x10 [Sat Feb 21 18:53:48 2026] ret_from_fork_asm+0x1a/0x30 [Sat Feb 21 18:53:48 2026] </TASK>

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/fa3c2f8d9152344a4…
https://git.kernel.org/stable/c/a9a7c3203fdc4d4a8…
https://git.kernel.org/stable/c/f975a0955276579e2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 505cc26bcae00699bacaee66cd50ede7a9cc89cb , < fa3c2f8d9152344a478abb847081c1b5f84a94f5 (git) Affected: 505cc26bcae00699bacaee66cd50ede7a9cc89cb , < a9a7c3203fdc4d4a8d8a7a3b1ed05d2bb4c6e77e (git) Affected: 505cc26bcae00699bacaee66cd50ede7a9cc89cb , < f975a0955276579e2176a134366ed586071c7c6a (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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            "drivers/net/ethernet/microsoft/mana/gdma_main.c",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Fix double destroy_workqueue on service rescan PCI path\n\nWhile testing corner cases in the driver, a use-after-free crash\nwas found on the service rescan PCI path.\n\nWhen mana_serv_reset() calls mana_gd_suspend(), mana_gd_cleanup()\ndestroys gc-\u003eservice_wq. If the subsequent mana_gd_resume() fails\nwith -ETIMEDOUT or -EPROTO, the code falls through to\nmana_serv_rescan() which triggers pci_stop_and_remove_bus_device().\nThis invokes the PCI .remove callback (mana_gd_remove), which calls\nmana_gd_cleanup() a second time, attempting to destroy the already-\nfreed workqueue. Fix this by NULL-checking gc-\u003eservice_wq in\nmana_gd_cleanup() and setting it to NULL after destruction.\n\nCall stack of issue for reference:\n[Sat Feb 21 18:53:48 2026] Call Trace:\n[Sat Feb 21 18:53:48 2026]  \u003cTASK\u003e\n[Sat Feb 21 18:53:48 2026]  mana_gd_cleanup+0x33/0x70 [mana]\n[Sat Feb 21 18:53:48 2026]  mana_gd_remove+0x3a/0xc0 [mana]\n[Sat Feb 21 18:53:48 2026]  pci_device_remove+0x41/0xb0\n[Sat Feb 21 18:53:48 2026]  device_remove+0x46/0x70\n[Sat Feb 21 18:53:48 2026]  device_release_driver_internal+0x1e3/0x250\n[Sat Feb 21 18:53:48 2026]  device_release_driver+0x12/0x20\n[Sat Feb 21 18:53:48 2026]  pci_stop_bus_device+0x6a/0x90\n[Sat Feb 21 18:53:48 2026]  pci_stop_and_remove_bus_device+0x13/0x30\n[Sat Feb 21 18:53:48 2026]  mana_do_service+0x180/0x290 [mana]\n[Sat Feb 21 18:53:48 2026]  mana_serv_func+0x24/0x50 [mana]\n[Sat Feb 21 18:53:48 2026]  process_one_work+0x190/0x3d0\n[Sat Feb 21 18:53:48 2026]  worker_thread+0x16e/0x2e0\n[Sat Feb 21 18:53:48 2026]  kthread+0xf7/0x130\n[Sat Feb 21 18:53:48 2026]  ? __pfx_worker_thread+0x10/0x10\n[Sat Feb 21 18:53:48 2026]  ? __pfx_kthread+0x10/0x10\n[Sat Feb 21 18:53:48 2026]  ret_from_fork+0x269/0x350\n[Sat Feb 21 18:53:48 2026]  ? __pfx_kthread+0x10/0x10\n[Sat Feb 21 18:53:48 2026]  ret_from_fork_asm+0x1a/0x30\n[Sat Feb 21 18:53:48 2026]  \u003c/TASK\u003e"
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          "url": "https://git.kernel.org/stable/c/f975a0955276579e2176a134366ed586071c7c6a"
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      "title": "net: mana: Fix double destroy_workqueue on service rescan PCI path",
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    "datePublished": "2026-05-06T11:28:58.840Z",
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CVE-2026-43341 (GCVE-0-2026-43341)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:37 – Updated: 2026-06-19 11:58

Title

net/ipv6: ioam6: prevent schema length wraparound in trace fill

Summary

In the Linux kernel, the following vulnerability has been resolved: net/ipv6: ioam6: prevent schema length wraparound in trace fill ioam6_fill_trace_data() stores the schema contribution to the trace length in a u8. With bit 22 enabled and the largest schema payload, sclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the remaining-space check. __ioam6_fill_trace_data() then positions the write cursor without reserving the schema area but still copies the 4-byte schema header and the full schema payload, overrunning the trace buffer. Keep sclen in an unsigned int so the remaining-space check and the write cursor calculation both see the full schema length.

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

References

7 references

URL	Tags
https://git.kernel.org/stable/c/d3a1fb2ca323d7a4e…
https://git.kernel.org/stable/c/e96d48b37708d53cb…
https://git.kernel.org/stable/c/d1b041080086e91d3…
https://git.kernel.org/stable/c/77695a69baca9b99d…
https://git.kernel.org/stable/c/184d2e9db27c0f762…
https://git.kernel.org/stable/c/d6e1c9b02d85a4f1f…
https://git.kernel.org/stable/c/5e67ba9bb531e1ec6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2 (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < e96d48b37708d53cbdc47f6f60b0714fc4a5f596 (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < d1b041080086e91d3733a5438a8c51ad5d3d8e09 (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < 77695a69baca9b99d95fad09fc78c2318736604f (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < 184d2e9db27c0f76226b5cad16fe29510a5d2280 (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d (git) Affected: 8c6f6fa6772696be0c047a711858084b38763728 , < 5e67ba9bb531e1ec6599a82a065dea9040b9ce50 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.168 , ≤ 6.1.* (semver) Unaffected: 6.6.134 , ≤ 6.6.* (semver) Unaffected: 6.12.81 , ≤ 6.12.* (semver) Unaffected: 6.18.22 , ≤ 6.18.* (semver) Unaffected: 6.19.12 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/ipv6: ioam6: prevent schema length wraparound in trace fill\n\nioam6_fill_trace_data() stores the schema contribution to the trace\nlength in a u8. With bit 22 enabled and the largest schema payload,\nsclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the\nremaining-space check. __ioam6_fill_trace_data() then positions the\nwrite cursor without reserving the schema area but still copies the\n4-byte schema header and the full schema payload, overrunning the trace\nbuffer.\n\nKeep sclen in an unsigned int so the remaining-space check and the write\ncursor calculation both see the full schema length."
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CVE-2026-46155 (GCVE-0-2026-46155)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-06-14 17:58

Title

smb/client: fix out-of-bounds read in smb2_compound_op()

Summary

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in smb2_compound_op() If a server sends a truncated response but a large OutputBufferLength, and terminates the EA list early, check_wsl_eas() returns success without validating that the entire OutputBufferLength fits within iov_len. Then smb2_compound_op() does: memcpy(idata->wsl.eas, data[0], size[0]); Where size[0] is OutputBufferLength. If iov_len is smaller than size[0], memcpy can read beyond the end of the rsp_iov allocation and leak adjacent kernel heap memory.

Severity

9.1 (Critical)


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

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/dffb44b2e06a2908e…
https://git.kernel.org/stable/c/9b3af35645ff9cd33…
https://git.kernel.org/stable/c/512d33bc8ea4ea5c1…
https://git.kernel.org/stable/c/a16f70a71be4b5a4e…
https://git.kernel.org/stable/c/8d09328dfda089675…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7449d736bbbd160c76b01b8fcdf72f58a8757d4b , < dffb44b2e06a2908e249f0f93156fc987eee1d1c (git) Affected: ea41367b2a602f602ea6594fc4a310520dcc64f4 , < 9b3af35645ff9cd334edc130249f9a2fb2bea25f (git) Affected: ea41367b2a602f602ea6594fc4a310520dcc64f4 , < 512d33bc8ea4ea5c19728ee118715f4b1f4d1926 (git) Affected: ea41367b2a602f602ea6594fc4a310520dcc64f4 , < a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c (git) Affected: ea41367b2a602f602ea6594fc4a310520dcc64f4 , < 8d09328dfda089675e4c049f3f256064a1d1996b (git) Affected: 6.6.32 , < 6.6.140 (semver)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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CVE-2026-46242 (GCVE-0-2026-46242)

Vulnerability from cvelistv5 – Published: 2026-05-30 12:13 – Updated: 2026-07-09 00:31

Title

eventpoll: fix ep_remove struct eventpoll / struct file UAF

Summary

In the Linux kernel, the following vulnerability has been resolved: eventpoll: fix ep_remove struct eventpoll / struct file UAF ep_remove() (via ep_remove_file()) cleared file->f_ep under file->f_lock but then kept using @file inside the critical section (is_file_epoll(), hlist_del_rcu() through the head, spin_unlock). A concurrent __fput() taking the eventpoll_release() fastpath in that window observed the transient NULL, skipped eventpoll_release_file() and ran to f_op->release / file_free(). For the epoll-watches-epoll case, f_op->release is ep_eventpoll_release() -> ep_clear_and_put() -> ep_free(), which kfree()s the watched struct eventpoll. Its embedded ->refs hlist_head is exactly where epi->fllink.pprev points, so the subsequent hlist_del_rcu()'s "*pprev = next" scribbles into freed kmalloc-192 memory. In addition, struct file is SLAB_TYPESAFE_BY_RCU, so the slot backing @file could be recycled by alloc_empty_file() -- reinitializing f_lock and f_ep -- while ep_remove() is still nominally inside that lock. The upshot is an attacker-controllable kmem_cache_free() against the wrong slab cache. Pin @file via epi_fget() at the top of ep_remove() and gate the critical section on the pin succeeding. With the pin held @file cannot reach refcount zero, which holds __fput() off and transitively keeps the watched struct eventpoll alive across the hlist_del_rcu() and the f_lock use, closing both UAFs. If the pin fails @file has already reached refcount zero and its __fput() is in flight. Because we bailed before clearing f_ep, that path takes the eventpoll_release() slow path into eventpoll_release_file() and blocks on ep->mtx until the waiter side's ep_clear_and_put() drops it. The bailed epi's share of ep->refcount stays intact, so the trailing ep_refcount_dec_and_test() in ep_clear_and_put() cannot free the eventpoll out from under eventpoll_release_file(); the orphaned epi is then cleaned up there. A successful pin also proves we are not racing eventpoll_release_file() on this epi, so drop the now-redundant re-check of epi->dying under f_lock. The cheap lockless READ_ONCE(epi->dying) fast-path bailout stays.

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

References

6 references

URL	Tags
https://git.kernel.org/stable/c/2de4db145b2992da4…
https://git.kernel.org/stable/c/9324de74a3a59b9fd…
https://git.kernel.org/stable/c/ef4ca02e95363e789…
https://git.kernel.org/stable/c/ced39b6a8062bac5c…
https://git.kernel.org/stable/c/a6dc643c69311677c…
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 58c9b016e12855286370dfb704c08498edbc857a , < 2de4db145b2992da496fea6c51f9839be678ae24 (git) Affected: 58c9b016e12855286370dfb704c08498edbc857a , < 9324de74a3a59b9fde9b62ee45ebaa71458ba2e5 (git) Affected: 58c9b016e12855286370dfb704c08498edbc857a , < ef4ca02e95363e78977ca04340d44fe3b4b2b81f (git) Affected: 58c9b016e12855286370dfb704c08498edbc857a , < ced39b6a8062bac5c18a1c3df85634107eb8664a (git) Affected: 58c9b016e12855286370dfb704c08498edbc857a , < a6dc643c69311677c574a0f17a3f4d66a5f3744b (git) Affected: f2451def095c1743adcfcb0cb5dadc86034e162a (git) Affected: a1f93804449d13f97dabd4b996817de4bf1ed67a (git) Affected: 5.15.209 , < 5.16 (semver) Affected: 6.1.175 , < 6.2 (semver)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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CVE-2026-46259 (GCVE-0-2026-46259)

Vulnerability from cvelistv5 – Published: 2026-06-03 15:49 – Updated: 2026-06-05 06:06

Title

procfs: fix missing RCU protection when reading real_parent in do_task_stat()

Summary

In the Linux kernel, the following vulnerability has been resolved: procfs: fix missing RCU protection when reading real_parent in do_task_stat() When reading /proc/[pid]/stat, do_task_stat() accesses task->real_parent without proper RCU protection, which leads to: cpu 0 cpu 1 ----- ----- do_task_stat var = task->real_parent release_task call_rcu(delayed_put_task_struct) task_tgid_nr_ns(var) rcu_read_lock <--- Too late to protect task->real_parent! task_pid_ptr <--- UAF! rcu_read_unlock This patch uses task_ppid_nr_ns() instead of task_tgid_nr_ns() to add proper RCU protection for accessing task->real_parent.

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

References

8 references

URL	Tags
https://git.kernel.org/stable/c/fefa0fcd78be465b7…
https://git.kernel.org/stable/c/c93a33f28f915d446…
https://git.kernel.org/stable/c/1c8dc5b5517546c68…
https://git.kernel.org/stable/c/0e64bd46a04a4fd61…
https://git.kernel.org/stable/c/73ec7c96601d61d52…
https://git.kernel.org/stable/c/4f9ae386861e280b7…
https://git.kernel.org/stable/c/dd8b13cb4ff1a4545…
https://git.kernel.org/stable/c/76149d53502cf17ef…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 06fffb1267c9d986687b69d74a46ee332a50575e , < fefa0fcd78be465b7ad4c497fa6ec90d64194c04 (git) Affected: 06fffb1267c9d986687b69d74a46ee332a50575e , < c93a33f28f915d446eea6fb3f0e1def0b3af1982 (git) Affected: 06fffb1267c9d986687b69d74a46ee332a50575e , < 1c8dc5b5517546c68ffae40b948336122bb61306 (git) Affected: 06fffb1267c9d986687b69d74a46ee332a50575e , < 0e64bd46a04a4fd61279aca9f53a664e9e5f7e7e (git) Affected: 06fffb1267c9d986687b69d74a46ee332a50575e , < 73ec7c96601d61d52310c659145bb06d933a0fa6 (git) Affected: 06fffb1267c9d986687b69d74a46ee332a50575e , < 4f9ae386861e280b7631ca252f798d25575627ee (git) Affected: 06fffb1267c9d986687b69d74a46ee332a50575e , < dd8b13cb4ff1a4545a214ed897fdf2bc341155b6 (git) Affected: 06fffb1267c9d986687b69d74a46ee332a50575e , < 76149d53502cf17ef3ae454ff384551236fba867 (git)
Linux	Linux	Affected: 2.6.26 Unaffected: 0 , < 2.6.26 (semver) Unaffected: 5.10.252 , ≤ 5.10.* (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.14 , ≤ 6.18.* (semver) Unaffected: 6.19.4 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/proc/array.c"
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              "version": "0",
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              "status": "unaffected",
              "version": "5.10.252",
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              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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              ],
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nprocfs: fix missing RCU protection when reading real_parent in do_task_stat()\n\nWhen reading /proc/[pid]/stat, do_task_stat() accesses task-\u003ereal_parent\nwithout proper RCU protection, which leads to:\n\n  cpu 0                               cpu 1\n  -----                               -----\n  do_task_stat\n    var = task-\u003ereal_parent\n                                      release_task\n                                        call_rcu(delayed_put_task_struct)\n    task_tgid_nr_ns(var)\n      rcu_read_lock   \u003c--- Too late to protect task-\u003ereal_parent!\n      task_pid_ptr    \u003c--- UAF!\n      rcu_read_unlock\n\nThis patch uses task_ppid_nr_ns() instead of task_tgid_nr_ns() to add\nproper RCU protection for accessing task-\u003ereal_parent."
        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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      "providerMetadata": {
        "dateUpdated": "2026-06-05T06:06:27.857Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
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          "url": "https://git.kernel.org/stable/c/0e64bd46a04a4fd61279aca9f53a664e9e5f7e7e"
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          "url": "https://git.kernel.org/stable/c/dd8b13cb4ff1a4545a214ed897fdf2bc341155b6"
        },
        {
          "url": "https://git.kernel.org/stable/c/76149d53502cf17ef3ae454ff384551236fba867"
        }
      ],
      "title": "procfs: fix missing RCU protection when reading real_parent in do_task_stat()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46259",
    "datePublished": "2026-06-03T15:49:56.428Z",
    "dateReserved": "2026-05-13T15:03:33.108Z",
    "dateUpdated": "2026-06-05T06:06:27.857Z",
    "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.

Action not permitted

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Tags

Sightings

Nomenclature