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CVE-2026-31396 (GCVE-0-2026-31396)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:16 – Updated: 2026-09-08 08:46
VLAI
Title
net: macb: fix use-after-free access to PTP clock
Summary
In the Linux kernel, the following vulnerability has been resolved: net: macb: fix use-after-free access to PTP clock PTP clock is registered on every opening of the interface and destroyed on every closing. However it may be accessed via get_ts_info ethtool call which is possible while the interface is just present in the kernel. BUG: KASAN: use-after-free in ptp_clock_index+0x47/0x50 drivers/ptp/ptp_clock.c:426 Read of size 4 at addr ffff8880194345cc by task syz.0.6/948 CPU: 1 PID: 948 Comm: syz.0.6 Not tainted 6.1.164+ #109 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x8d/0xba lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x17f/0x496 mm/kasan/report.c:420 kasan_report+0xd9/0x180 mm/kasan/report.c:524 ptp_clock_index+0x47/0x50 drivers/ptp/ptp_clock.c:426 gem_get_ts_info+0x138/0x1e0 drivers/net/ethernet/cadence/macb_main.c:3349 macb_get_ts_info+0x68/0xb0 drivers/net/ethernet/cadence/macb_main.c:3371 __ethtool_get_ts_info+0x17c/0x260 net/ethtool/common.c:558 ethtool_get_ts_info net/ethtool/ioctl.c:2367 [inline] __dev_ethtool net/ethtool/ioctl.c:3017 [inline] dev_ethtool+0x2b05/0x6290 net/ethtool/ioctl.c:3095 dev_ioctl+0x637/0x1070 net/core/dev_ioctl.c:510 sock_do_ioctl+0x20d/0x2c0 net/socket.c:1215 sock_ioctl+0x577/0x6d0 net/socket.c:1320 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x18c/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 </TASK> Allocated by task 457: kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] ptp_clock_register+0x144/0x10e0 drivers/ptp/ptp_clock.c:235 gem_ptp_init+0x46f/0x930 drivers/net/ethernet/cadence/macb_ptp.c:375 macb_open+0x901/0xd10 drivers/net/ethernet/cadence/macb_main.c:2920 __dev_open+0x2ce/0x500 net/core/dev.c:1501 __dev_change_flags+0x56a/0x740 net/core/dev.c:8651 dev_change_flags+0x92/0x170 net/core/dev.c:8722 do_setlink+0xaf8/0x3a80 net/core/rtnetlink.c:2833 __rtnl_newlink+0xbf4/0x1940 net/core/rtnetlink.c:3608 rtnl_newlink+0x63/0xa0 net/core/rtnetlink.c:3655 rtnetlink_rcv_msg+0x3c6/0xed0 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x15d/0x430 net/netlink/af_netlink.c:2511 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x6d7/0xa30 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x97e/0xeb0 net/netlink/af_netlink.c:1872 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x14b/0x180 net/socket.c:730 __sys_sendto+0x320/0x3b0 net/socket.c:2152 __do_sys_sendto net/socket.c:2164 [inline] __se_sys_sendto net/socket.c:2160 [inline] __x64_sys_sendto+0xdc/0x1b0 net/socket.c:2160 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Freed by task 938: kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1729 [inline] slab_free_freelist_hook mm/slub.c:1755 [inline] slab_free mm/slub.c:3687 [inline] __kmem_cache_free+0xbc/0x320 mm/slub.c:3700 device_release+0xa0/0x240 drivers/base/core.c:2507 kobject_cleanup lib/kobject.c:681 [inline] kobject_release lib/kobject.c:712 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1cd/0x350 lib/kobject.c:729 put_device+0x1b/0x30 drivers/base/core.c:3805 ptp_clock_unregister+0x171/0x270 drivers/ptp/ptp_clock.c:391 gem_ptp_remove+0x4e/0x1f0 drivers/net/ethernet/cadence/macb_ptp.c:404 macb_close+0x1c8/0x270 drivers/net/ethernet/cadence/macb_main.c:2966 __dev_close_many+0x1b9/0x310 net/core/dev.c:1585 __dev_close net/core/dev.c:1597 [inline] __dev_change_flags+0x2bb/0x740 net/core/dev.c:8649 dev_change_fl ---truncated---
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c2594d804d5c8033861d44840673d852d98508c1 , < 8820ffe0975fd2efbe50453e9179c8e1c33a13d3 (git)
Affected: c2594d804d5c8033861d44840673d852d98508c1 , < 6b757f345eeea87ed5d8afd6de35b927a1a57a2f (git)
Affected: c2594d804d5c8033861d44840673d852d98508c1 , < 341d01087f821aa0f165fb1ffc8bfe4e50776da7 (git)
Affected: c2594d804d5c8033861d44840673d852d98508c1 , < 5653af416a48f6c18f9626ae9df96f814f45ff34 (git)
Affected: c2594d804d5c8033861d44840673d852d98508c1 , < 0bb848d8c64938024e45780f8032f1f67d3a3607 (git)
Affected: c2594d804d5c8033861d44840673d852d98508c1 , < 1f4714065b2bcbb0a4013fd355b84b848e6cc345 (git)
Affected: c2594d804d5c8033861d44840673d852d98508c1 , < eb652535e9ec795ef5c1078f7578eaaed755268b (git)
Affected: c2594d804d5c8033861d44840673d852d98508c1 , < 8da13e6d63c1a97f7302d342c89c4a56a55c7015 (git)
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Linux Linux Affected: 4.11
Unaffected: 0 , < 4.11 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: fix use-after-free access to PTP clock\n\nPTP clock is registered on every opening of the interface and destroyed on\nevery closing.  However it may be accessed via get_ts_info ethtool call\nwhich is possible while the interface is just present in the kernel.\n\nBUG: KASAN: use-after-free in ptp_clock_index+0x47/0x50 drivers/ptp/ptp_clock.c:426\nRead of size 4 at addr ffff8880194345cc by task syz.0.6/948\n\nCPU: 1 PID: 948 Comm: syz.0.6 Not tainted 6.1.164+ #109\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x8d/0xba lib/dump_stack.c:106\n print_address_description mm/kasan/report.c:316 [inline]\n print_report+0x17f/0x496 mm/kasan/report.c:420\n kasan_report+0xd9/0x180 mm/kasan/report.c:524\n ptp_clock_index+0x47/0x50 drivers/ptp/ptp_clock.c:426\n gem_get_ts_info+0x138/0x1e0 drivers/net/ethernet/cadence/macb_main.c:3349\n macb_get_ts_info+0x68/0xb0 drivers/net/ethernet/cadence/macb_main.c:3371\n __ethtool_get_ts_info+0x17c/0x260 net/ethtool/common.c:558\n ethtool_get_ts_info net/ethtool/ioctl.c:2367 [inline]\n __dev_ethtool net/ethtool/ioctl.c:3017 [inline]\n dev_ethtool+0x2b05/0x6290 net/ethtool/ioctl.c:3095\n dev_ioctl+0x637/0x1070 net/core/dev_ioctl.c:510\n sock_do_ioctl+0x20d/0x2c0 net/socket.c:1215\n sock_ioctl+0x577/0x6d0 net/socket.c:1320\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:870 [inline]\n __se_sys_ioctl fs/ioctl.c:856 [inline]\n __x64_sys_ioctl+0x18c/0x210 fs/ioctl.c:856\n do_syscall_x64 arch/x86/entry/common.c:46 [inline]\n do_syscall_64+0x35/0x80 arch/x86/entry/common.c:76\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n \u003c/TASK\u003e\n\nAllocated by task 457:\n kmalloc include/linux/slab.h:563 [inline]\n kzalloc include/linux/slab.h:699 [inline]\n ptp_clock_register+0x144/0x10e0 drivers/ptp/ptp_clock.c:235\n gem_ptp_init+0x46f/0x930 drivers/net/ethernet/cadence/macb_ptp.c:375\n macb_open+0x901/0xd10 drivers/net/ethernet/cadence/macb_main.c:2920\n __dev_open+0x2ce/0x500 net/core/dev.c:1501\n __dev_change_flags+0x56a/0x740 net/core/dev.c:8651\n dev_change_flags+0x92/0x170 net/core/dev.c:8722\n do_setlink+0xaf8/0x3a80 net/core/rtnetlink.c:2833\n __rtnl_newlink+0xbf4/0x1940 net/core/rtnetlink.c:3608\n rtnl_newlink+0x63/0xa0 net/core/rtnetlink.c:3655\n rtnetlink_rcv_msg+0x3c6/0xed0 net/core/rtnetlink.c:6150\n netlink_rcv_skb+0x15d/0x430 net/netlink/af_netlink.c:2511\n netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]\n netlink_unicast+0x6d7/0xa30 net/netlink/af_netlink.c:1344\n netlink_sendmsg+0x97e/0xeb0 net/netlink/af_netlink.c:1872\n sock_sendmsg_nosec net/socket.c:718 [inline]\n __sock_sendmsg+0x14b/0x180 net/socket.c:730\n __sys_sendto+0x320/0x3b0 net/socket.c:2152\n __do_sys_sendto net/socket.c:2164 [inline]\n __se_sys_sendto net/socket.c:2160 [inline]\n __x64_sys_sendto+0xdc/0x1b0 net/socket.c:2160\n do_syscall_x64 arch/x86/entry/common.c:46 [inline]\n do_syscall_64+0x35/0x80 arch/x86/entry/common.c:76\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\nFreed by task 938:\n kasan_slab_free include/linux/kasan.h:177 [inline]\n slab_free_hook mm/slub.c:1729 [inline]\n slab_free_freelist_hook mm/slub.c:1755 [inline]\n slab_free mm/slub.c:3687 [inline]\n __kmem_cache_free+0xbc/0x320 mm/slub.c:3700\n device_release+0xa0/0x240 drivers/base/core.c:2507\n kobject_cleanup lib/kobject.c:681 [inline]\n kobject_release lib/kobject.c:712 [inline]\n kref_put include/linux/kref.h:65 [inline]\n kobject_put+0x1cd/0x350 lib/kobject.c:729\n put_device+0x1b/0x30 drivers/base/core.c:3805\n ptp_clock_unregister+0x171/0x270 drivers/ptp/ptp_clock.c:391\n gem_ptp_remove+0x4e/0x1f0 drivers/net/ethernet/cadence/macb_ptp.c:404\n macb_close+0x1c8/0x270 drivers/net/ethernet/cadence/macb_main.c:2966\n __dev_close_many+0x1b9/0x310 net/core/dev.c:1585\n __dev_close net/core/dev.c:1597 [inline]\n __dev_change_flags+0x2bb/0x740 net/core/dev.c:8649\n dev_change_fl\n---truncated---"
        }
      ],
      "metrics": [
        {
          "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"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable dereference is reached through local ethtool timestamp-info requests, not through received Ethernet/PTP packets. Network traffic alone does not enter gem_get_ts_info().\nAC:L - No attacker-uncontrolled race is required; once interface open/close leaves a stale PTP clock pointer, a timestamp-info query deterministically dereferences it. The trigger can be repeated while the stale pointer remains.\nPR:L - A basic local user can issue the ETHTOOL_GET_TS_INFO query path, which ethtool explicitly allows without CAP_NET_ADMIN. Interface cycling is privileged, but the stale state can exist after normal system management, so the higher-severity defensible choice is PR:L.\nUI:N - No victim action is required after the affected macb/GEM interface exists in the vulnerable state. The attacker invokes the local query directly.\nS:U - The bug is in a kernel network driver and impacts the same kernel security authority. It is not a guest-to-host, IOMMU, or other cross-scope boundary bypass.\nC:H - This is a kernel heap use-after-free of struct ptp_clock reached through a stale driver pointer. Under the kernel scoring guidance, UAFs are treated as high confidentiality impact because freed object reuse can enable memory disclosure primitives.\nI:H - Although the observed crash path is a stale read of the PTP clock index, the underlying bug is a kernel heap UAF. Under the required kernel guidance, UAFs are scored as high integrity impact because heap reuse can be leveraged toward control-flow or write primitives.\nA:H - The reported KASAN trace shows a use-after-free in ptp_clock_index(), and such kernel UAFs can cause oops/panic or repeated system crashes. Availability impact is therefore high."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:22:05.900Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8820ffe0975fd2efbe50453e9179c8e1c33a13d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b757f345eeea87ed5d8afd6de35b927a1a57a2f"
        },
        {
          "url": "https://git.kernel.org/stable/c/341d01087f821aa0f165fb1ffc8bfe4e50776da7"
        },
        {
          "url": "https://git.kernel.org/stable/c/5653af416a48f6c18f9626ae9df96f814f45ff34"
        },
        {
          "url": "https://git.kernel.org/stable/c/0bb848d8c64938024e45780f8032f1f67d3a3607"
        },
        {
          "url": "https://git.kernel.org/stable/c/1f4714065b2bcbb0a4013fd355b84b848e6cc345"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb652535e9ec795ef5c1078f7578eaaed755268b"
        },
        {
          "url": "https://git.kernel.org/stable/c/8da13e6d63c1a97f7302d342c89c4a56a55c7015"
        }
      ],
      "title": "net: macb: fix use-after-free access to PTP clock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31396",
    "datePublished": "2026-04-03T15:16:00.579Z",
    "dateReserved": "2026-03-09T15:48:24.085Z",
    "dateUpdated": "2026-09-08T08:46:42.590Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-31396",
      "date": "2026-09-16",
      "epss": "0.00122",
      "percentile": "0.02305"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31396\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-03T16:16:37.887\",\"lastModified\":\"2026-07-14T13:18:37.750\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: macb: fix use-after-free access to PTP clock\\n\\nPTP clock is registered on every opening of the interface and destroyed on\\nevery closing.  However it may be accessed via get_ts_info ethtool call\\nwhich is possible while the interface is just present in the kernel.\\n\\nBUG: KASAN: use-after-free in ptp_clock_index+0x47/0x50 drivers/ptp/ptp_clock.c:426\\nRead of size 4 at addr ffff8880194345cc by task syz.0.6/948\\n\\nCPU: 1 PID: 948 Comm: syz.0.6 Not tainted 6.1.164+ #109\\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:88 [inline]\\n dump_stack_lvl+0x8d/0xba lib/dump_stack.c:106\\n print_address_description mm/kasan/report.c:316 [inline]\\n print_report+0x17f/0x496 mm/kasan/report.c:420\\n kasan_report+0xd9/0x180 mm/kasan/report.c:524\\n ptp_clock_index+0x47/0x50 drivers/ptp/ptp_clock.c:426\\n gem_get_ts_info+0x138/0x1e0 drivers/net/ethernet/cadence/macb_main.c:3349\\n macb_get_ts_info+0x68/0xb0 drivers/net/ethernet/cadence/macb_main.c:3371\\n __ethtool_get_ts_info+0x17c/0x260 net/ethtool/common.c:558\\n ethtool_get_ts_info net/ethtool/ioctl.c:2367 [inline]\\n __dev_ethtool net/ethtool/ioctl.c:3017 [inline]\\n dev_ethtool+0x2b05/0x6290 net/ethtool/ioctl.c:3095\\n dev_ioctl+0x637/0x1070 net/core/dev_ioctl.c:510\\n sock_do_ioctl+0x20d/0x2c0 net/socket.c:1215\\n sock_ioctl+0x577/0x6d0 net/socket.c:1320\\n vfs_ioctl fs/ioctl.c:51 [inline]\\n __do_sys_ioctl fs/ioctl.c:870 [inline]\\n __se_sys_ioctl fs/ioctl.c:856 [inline]\\n __x64_sys_ioctl+0x18c/0x210 fs/ioctl.c:856\\n do_syscall_x64 arch/x86/entry/common.c:46 [inline]\\n do_syscall_64+0x35/0x80 arch/x86/entry/common.c:76\\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\\n \u003c/TASK\u003e\\n\\nAllocated by task 457:\\n kmalloc include/linux/slab.h:563 [inline]\\n kzalloc include/linux/slab.h:699 [inline]\\n ptp_clock_register+0x144/0x10e0 drivers/ptp/ptp_clock.c:235\\n gem_ptp_init+0x46f/0x930 drivers/net/ethernet/cadence/macb_ptp.c:375\\n macb_open+0x901/0xd10 drivers/net/ethernet/cadence/macb_main.c:2920\\n __dev_open+0x2ce/0x500 net/core/dev.c:1501\\n __dev_change_flags+0x56a/0x740 net/core/dev.c:8651\\n dev_change_flags+0x92/0x170 net/core/dev.c:8722\\n do_setlink+0xaf8/0x3a80 net/core/rtnetlink.c:2833\\n __rtnl_newlink+0xbf4/0x1940 net/core/rtnetlink.c:3608\\n rtnl_newlink+0x63/0xa0 net/core/rtnetlink.c:3655\\n rtnetlink_rcv_msg+0x3c6/0xed0 net/core/rtnetlink.c:6150\\n netlink_rcv_skb+0x15d/0x430 net/netlink/af_netlink.c:2511\\n netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]\\n netlink_unicast+0x6d7/0xa30 net/netlink/af_netlink.c:1344\\n netlink_sendmsg+0x97e/0xeb0 net/netlink/af_netlink.c:1872\\n sock_sendmsg_nosec net/socket.c:718 [inline]\\n __sock_sendmsg+0x14b/0x180 net/socket.c:730\\n __sys_sendto+0x320/0x3b0 net/socket.c:2152\\n __do_sys_sendto net/socket.c:2164 [inline]\\n __se_sys_sendto net/socket.c:2160 [inline]\\n __x64_sys_sendto+0xdc/0x1b0 net/socket.c:2160\\n do_syscall_x64 arch/x86/entry/common.c:46 [inline]\\n do_syscall_64+0x35/0x80 arch/x86/entry/common.c:76\\n entry_SYSCALL_64_after_hwframe+0x6e/0xd8\\n\\nFreed by task 938:\\n kasan_slab_free include/linux/kasan.h:177 [inline]\\n slab_free_hook mm/slub.c:1729 [inline]\\n slab_free_freelist_hook mm/slub.c:1755 [inline]\\n slab_free mm/slub.c:3687 [inline]\\n __kmem_cache_free+0xbc/0x320 mm/slub.c:3700\\n device_release+0xa0/0x240 drivers/base/core.c:2507\\n kobject_cleanup lib/kobject.c:681 [inline]\\n kobject_release lib/kobject.c:712 [inline]\\n kref_put include/linux/kref.h:65 [inline]\\n kobject_put+0x1cd/0x350 lib/kobject.c:729\\n put_device+0x1b/0x30 drivers/base/core.c:3805\\n ptp_clock_unregister+0x171/0x270 drivers/ptp/ptp_clock.c:391\\n gem_ptp_remove+0x4e/0x1f0 drivers/net/ethernet/cadence/macb_ptp.c:404\\n macb_close+0x1c8/0x270 drivers/net/ethernet/cadence/macb_main.c:2966\\n __dev_close_many+0x1b9/0x310 net/core/dev.c:1585\\n __dev_close net/core/dev.c:1597 [inline]\\n __dev_change_flags+0x2bb/0x740 net/core/dev.c:8649\\n dev_change_fl\\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/cadence/macb_ptp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c2594d804d5c8033861d44840673d852d98508c1\",\"lessThan\":\"8820ffe0975fd2efbe50453e9179c8e1c33a13d3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2594d804d5c8033861d44840673d852d98508c1\",\"lessThan\":\"6b757f345eeea87ed5d8afd6de35b927a1a57a2f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2594d804d5c8033861d44840673d852d98508c1\",\"lessThan\":\"341d01087f821aa0f165fb1ffc8bfe4e50776da7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2594d804d5c8033861d44840673d852d98508c1\",\"lessThan\":\"5653af416a48f6c18f9626ae9df96f814f45ff34\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2594d804d5c8033861d44840673d852d98508c1\",\"lessThan\":\"0bb848d8c64938024e45780f8032f1f67d3a3607\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2594d804d5c8033861d44840673d852d98508c1\",\"lessThan\":\"1f4714065b2bcbb0a4013fd355b84b848e6cc345\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2594d804d5c8033861d44840673d852d98508c1\",\"lessThan\":\"eb652535e9ec795ef5c1078f7578eaaed755268b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2594d804d5c8033861d44840673d852d98508c1\",\"lessThan\":\"8da13e6d63c1a97f7302d342c89c4a56a55c7015\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/cadence/macb_ptp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.11\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.11\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.253\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.203\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.167\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.130\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.78\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.20\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.10\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:24:49+00:00",
      "cve": "CVE-2026-31396",
      "id": "CVE-2026-31396",
      "initial_release_date": "2026-04-03T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: macb: fix use-after-free access to PTP clock",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31396.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:32:52Z",
      "cve": "CVE-2026-31396",
      "id": "CVE-2026-31396",
      "initial_release_date": "2026-04-03T23:25:52Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "722",
      "product_status:known_not_affected": "6",
      "product_status:recommended": "279",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-31396",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-31396.json",
      "version": "24"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.