CVE-2024-26631 (GCVE-0-2024-26631)

Vulnerability from cvelistv5 – Published: 2024-03-18 10:07 – Updated: 2026-05-11 20:01
VLAI?
Title
ipv6: mcast: fix data-race in ipv6_mc_down / mld_ifc_work
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: fix data-race in ipv6_mc_down / mld_ifc_work idev->mc_ifc_count can be written over without proper locking. Originally found by syzbot [1], fix this issue by encapsulating calls to mld_ifc_stop_work() (and mld_gq_stop_work() for good measure) with mutex_lock() and mutex_unlock() accordingly as these functions should only be called with mc_lock per their declarations. [1] BUG: KCSAN: data-race in ipv6_mc_down / mld_ifc_work write to 0xffff88813a80c832 of 1 bytes by task 3771 on cpu 0: mld_ifc_stop_work net/ipv6/mcast.c:1080 [inline] ipv6_mc_down+0x10a/0x280 net/ipv6/mcast.c:2725 addrconf_ifdown+0xe32/0xf10 net/ipv6/addrconf.c:3949 addrconf_notify+0x310/0x980 notifier_call_chain kernel/notifier.c:93 [inline] raw_notifier_call_chain+0x6b/0x1c0 kernel/notifier.c:461 __dev_notify_flags+0x205/0x3d0 dev_change_flags+0xab/0xd0 net/core/dev.c:8685 do_setlink+0x9f6/0x2430 net/core/rtnetlink.c:2916 rtnl_group_changelink net/core/rtnetlink.c:3458 [inline] __rtnl_newlink net/core/rtnetlink.c:3717 [inline] rtnl_newlink+0xbb3/0x1670 net/core/rtnetlink.c:3754 rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6558 netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2545 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6576 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x589/0x650 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c:1910 ... write to 0xffff88813a80c832 of 1 bytes by task 22 on cpu 1: mld_ifc_work+0x54c/0x7b0 net/ipv6/mcast.c:2653 process_one_work kernel/workqueue.c:2627 [inline] process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2700 worker_thread+0x525/0x730 kernel/workqueue.c:2781 ...
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 2d9a93b4902be6a5504b5941dd15e9cd776aadca , < 62b3387beef11738eb6ce667601a28fa089fa02c (git)
Affected: 2d9a93b4902be6a5504b5941dd15e9cd776aadca , < 380540bb06bb1d1b12bdc947d1b8f56cda6b5663 (git)
Affected: 2d9a93b4902be6a5504b5941dd15e9cd776aadca , < 3cc283fd16fba72e2cefe3a6f48d7a36b0438900 (git)
Affected: 2d9a93b4902be6a5504b5941dd15e9cd776aadca , < 3bb5849675ae1d592929798a2b37ea450879c855 (git)
Affected: 2d9a93b4902be6a5504b5941dd15e9cd776aadca , < 2e7ef287f07c74985f1bf2858bedc62bd9ebf155 (git)
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Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.148 , ≤ 5.15.* (semver)
Unaffected: 6.1.75 , ≤ 6.1.* (semver)
Unaffected: 6.6.14 , ≤ 6.6.* (semver)
Unaffected: 6.7.2 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipv6: mcast: fix data-race in ipv6_mc_down / mld_ifc_work\\n\\nidev-\u003emc_ifc_count can be written over without proper locking.\\n\\nOriginally found by syzbot [1], fix this issue by encapsulating calls\\nto mld_ifc_stop_work() (and mld_gq_stop_work() for good measure) with\\nmutex_lock() and mutex_unlock() accordingly as these functions\\nshould only be called with mc_lock per their declarations.\\n\\n[1]\\nBUG: KCSAN: data-race in ipv6_mc_down / mld_ifc_work\\n\\nwrite to 0xffff88813a80c832 of 1 bytes by task 3771 on cpu 0:\\n mld_ifc_stop_work net/ipv6/mcast.c:1080 [inline]\\n ipv6_mc_down+0x10a/0x280 net/ipv6/mcast.c:2725\\n addrconf_ifdown+0xe32/0xf10 net/ipv6/addrconf.c:3949\\n addrconf_notify+0x310/0x980\\n notifier_call_chain kernel/notifier.c:93 [inline]\\n raw_notifier_call_chain+0x6b/0x1c0 kernel/notifier.c:461\\n __dev_notify_flags+0x205/0x3d0\\n dev_change_flags+0xab/0xd0 net/core/dev.c:8685\\n do_setlink+0x9f6/0x2430 net/core/rtnetlink.c:2916\\n rtnl_group_changelink net/core/rtnetlink.c:3458 [inline]\\n __rtnl_newlink net/core/rtnetlink.c:3717 [inline]\\n rtnl_newlink+0xbb3/0x1670 net/core/rtnetlink.c:3754\\n rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6558\\n netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2545\\n rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6576\\n netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]\\n netlink_unicast+0x589/0x650 net/netlink/af_netlink.c:1368\\n netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c:1910\\n ...\\n\\nwrite to 0xffff88813a80c832 of 1 bytes by task 22 on cpu 1:\\n mld_ifc_work+0x54c/0x7b0 net/ipv6/mcast.c:2653\\n process_one_work kernel/workqueue.c:2627 [inline]\\n process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2700\\n worker_thread+0x525/0x730 kernel/workqueue.c:2781\\n ...\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: ipv6: mcast: corrige data-race en ipv6_mc_down / mld_ifc_work idev-\u0026gt;mc_ifc_count se puede sobrescribir sin el bloqueo adecuado. Originalmente encontrado por syzbot [1], solucione este problema encapsulando las llamadas a mld_ifc_stop_work() (y mld_gq_stop_work() por si acaso) con mutex_lock() y mutex_unlock() en consecuencia, ya que estas funciones solo deben llamarse con mc_lock seg\\u00fan sus declaraciones. [1] ERROR: KCSAN: carrera de datos en ipv6_mc_down / mld_ifc_work escribir en 0xffff88813a80c832 de 1 bytes por tarea 3771 en la CPU 0: mld_ifc_stop_work net/ipv6/mcast.c:1080 [en l\\u00ednea] ipv6_mc_down+0x10a/0x280 net/ipv6/mcast .c:2725 addrconf_ifdown+0xe32/0xf10 net/ipv6/addrconf.c:3949 addrconf_notify+0x310/0x980 notifier_call_chain kernel/notifier.c:93 [en l\\u00ednea] raw_notifier_call_chain+0x6b/0x1c0 kernel/notifier.c:461 __dev_notify_flag s+0x205/ 0x3d0 dev_change_flags+0xab/0xd0 net/core/dev.c:8685 do_setlink+0x9f6/0x2430 net/core/rtnetlink.c:2916 rtnl_group_changelink net/core/rtnetlink.c:3458 [en l\\u00ednea] __rtnl_newlink net/core/rtnetlink.c :3717 [en l\\u00ednea] rtnl_newlink+0xbb3/0x1670 net/core/rtnetlink.c:3754 rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6558 netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2545 rtnetlink_rcv+0 x1c /0x20 net/core/rtnetlink.c:6576 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [en l\\u00ednea] netlink_unicast+0x589/0x650 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c :1910 ... escriba en 0xffff88813a80c832 de 1 bytes por tarea 22 en la CPU 1: mld_ifc_work+0x54c/0x7b0 net/ipv6/mcast.c:2653 Process_one_work kernel/workqueue.c:2627 [en l\\u00ednea] Process_scheduled_works+0x5b8/0xa30 kernel/ workqueue.c:2700 trabajador_thread+0x525/0x730 kernel/workqueue.c:2781 ...\"}]",
      "id": "CVE-2024-26631",
      "lastModified": "2024-11-21T09:02:43.580",
      "published": "2024-03-18T11:15:09.483",
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      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26631\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-18T11:15:09.483\",\"lastModified\":\"2025-03-10T15:46:45.123\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nipv6: mcast: fix data-race in ipv6_mc_down / mld_ifc_work\\n\\nidev-\u003emc_ifc_count can be written over without proper locking.\\n\\nOriginally found by syzbot [1], fix this issue by encapsulating calls\\nto mld_ifc_stop_work() (and mld_gq_stop_work() for good measure) with\\nmutex_lock() and mutex_unlock() accordingly as these functions\\nshould only be called with mc_lock per their declarations.\\n\\n[1]\\nBUG: KCSAN: data-race in ipv6_mc_down / mld_ifc_work\\n\\nwrite to 0xffff88813a80c832 of 1 bytes by task 3771 on cpu 0:\\n mld_ifc_stop_work net/ipv6/mcast.c:1080 [inline]\\n ipv6_mc_down+0x10a/0x280 net/ipv6/mcast.c:2725\\n addrconf_ifdown+0xe32/0xf10 net/ipv6/addrconf.c:3949\\n addrconf_notify+0x310/0x980\\n notifier_call_chain kernel/notifier.c:93 [inline]\\n raw_notifier_call_chain+0x6b/0x1c0 kernel/notifier.c:461\\n __dev_notify_flags+0x205/0x3d0\\n dev_change_flags+0xab/0xd0 net/core/dev.c:8685\\n do_setlink+0x9f6/0x2430 net/core/rtnetlink.c:2916\\n rtnl_group_changelink net/core/rtnetlink.c:3458 [inline]\\n __rtnl_newlink net/core/rtnetlink.c:3717 [inline]\\n rtnl_newlink+0xbb3/0x1670 net/core/rtnetlink.c:3754\\n rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6558\\n netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2545\\n rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6576\\n netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]\\n netlink_unicast+0x589/0x650 net/netlink/af_netlink.c:1368\\n netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c:1910\\n ...\\n\\nwrite to 0xffff88813a80c832 of 1 bytes by task 22 on cpu 1:\\n mld_ifc_work+0x54c/0x7b0 net/ipv6/mcast.c:2653\\n process_one_work kernel/workqueue.c:2627 [inline]\\n process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2700\\n worker_thread+0x525/0x730 kernel/workqueue.c:2781\\n ...\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ipv6: mcast: corrige data-race en ipv6_mc_down / mld_ifc_work idev-\u0026gt;mc_ifc_count se puede sobrescribir sin el bloqueo adecuado. Originalmente encontrado por syzbot [1], solucione este problema encapsulando las llamadas a mld_ifc_stop_work() (y mld_gq_stop_work() por si acaso) con mutex_lock() y mutex_unlock() en consecuencia, ya que estas funciones solo deben llamarse con mc_lock seg\u00fan sus declaraciones. [1] ERROR: KCSAN: carrera de datos en ipv6_mc_down / mld_ifc_work escribir en 0xffff88813a80c832 de 1 bytes por tarea 3771 en la CPU 0: mld_ifc_stop_work net/ipv6/mcast.c:1080 [en l\u00ednea] ipv6_mc_down+0x10a/0x280 net/ipv6/mcast .c:2725 addrconf_ifdown+0xe32/0xf10 net/ipv6/addrconf.c:3949 addrconf_notify+0x310/0x980 notifier_call_chain kernel/notifier.c:93 [en l\u00ednea] raw_notifier_call_chain+0x6b/0x1c0 kernel/notifier.c:461 __dev_notify_flag s+0x205/ 0x3d0 dev_change_flags+0xab/0xd0 net/core/dev.c:8685 do_setlink+0x9f6/0x2430 net/core/rtnetlink.c:2916 rtnl_group_changelink net/core/rtnetlink.c:3458 [en l\u00ednea] __rtnl_newlink net/core/rtnetlink.c :3717 [en l\u00ednea] rtnl_newlink+0xbb3/0x1670 net/core/rtnetlink.c:3754 rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6558 netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2545 rtnetlink_rcv+0 x1c /0x20 net/core/rtnetlink.c:6576 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [en l\u00ednea] netlink_unicast+0x589/0x650 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c :1910 ... escriba en 0xffff88813a80c832 de 1 bytes por tarea 22 en la CPU 1: mld_ifc_work+0x54c/0x7b0 net/ipv6/mcast.c:2653 Process_one_work kernel/workqueue.c:2627 [en l\u00ednea] Process_scheduled_works+0x5b8/0xa30 kernel/ workqueue.c:2700 trabajador_thread+0x525/0x730 kernel/workqueue.c:2781 ...\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.13\",\"versionEndExcluding\":\"5.15.148\",\"matchCriteriaId\":\"204B38A4-3EB9-47E0-9F1D-0F4A2A97B347\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.75\",\"matchCriteriaId\":\"070D0ED3-90D0-4F95-B1FF-57D7F46F332D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.14\",\"matchCriteriaId\":\"5C6B50A6-3D8B-4CE2-BDCC-A098609CBA14\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.7.2\",\"matchCriteriaId\":\"7229C448-E0C9-488B-8939-36BA5254065E\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2e7ef287f07c74985f1bf2858bedc62bd9ebf155\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/380540bb06bb1d1b12bdc947d1b8f56cda6b5663\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3bb5849675ae1d592929798a2b37ea450879c855\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3cc283fd16fba72e2cefe3a6f48d7a36b0438900\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/62b3387beef11738eb6ce667601a28fa089fa02c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2e7ef287f07c74985f1bf2858bedc62bd9ebf155\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/380540bb06bb1d1b12bdc947d1b8f56cda6b5663\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3bb5849675ae1d592929798a2b37ea450879c855\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3cc283fd16fba72e2cefe3a6f48d7a36b0438900\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/62b3387beef11738eb6ce667601a28fa089fa02c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\"]}]}}",
    "vulnrichment": {
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      "dataType": "CVE_RECORD",
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  }
}


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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.