CVE-2024-40995 (GCVE-0-2024-40995)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:37 – Updated: 2025-11-03 21:58
VLAI?
Title
net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc() syzbot found hanging tasks waiting on rtnl_lock [1] A reproducer is available in the syzbot bug. When a request to add multiple actions with the same index is sent, the second request will block forever on the first request. This holds rtnl_lock, and causes tasks to hang. Return -EAGAIN to prevent infinite looping, while keeping documented behavior. [1] INFO: task kworker/1:0:5088 blocked for more than 143 seconds. Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: <TASK> context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6838 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:5953 [inline] reg_leave_invalid_chans net/wireless/reg.c:2466 [inline] reg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0190c1d452a91c38a3462abdd81752be1b9006a8 , < 0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74 (git)
Affected: 0190c1d452a91c38a3462abdd81752be1b9006a8 , < c6a7da65a296745535a964be1019ec7691b0cb90 (git)
Affected: 0190c1d452a91c38a3462abdd81752be1b9006a8 , < 25987a97eec4d5f897cd04ee1b45170829c610da (git)
Affected: 0190c1d452a91c38a3462abdd81752be1b9006a8 , < 6fc78d67f51aeb9a542d39a8714e16bc411582d4 (git)
Affected: 0190c1d452a91c38a3462abdd81752be1b9006a8 , < 5f926aa96b08b6c47178fe1171e7ae331c695fc2 (git)
Affected: 0190c1d452a91c38a3462abdd81752be1b9006a8 , < 7a0e497b597df7c4cf2b63fc6e9188b6cabe5335 (git)
Affected: 0190c1d452a91c38a3462abdd81752be1b9006a8 , < d864319871b05fadd153e0aede4811ca7008f5d6 (git)
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    Linux Linux Affected: 4.19
Unaffected: 0 , < 4.19 (semver)
Unaffected: 5.4.279 , ≤ 5.4.* (semver)
Unaffected: 5.10.221 , ≤ 5.10.* (semver)
Unaffected: 5.15.162 , ≤ 5.15.* (semver)
Unaffected: 6.1.96 , ≤ 6.1.* (semver)
Unaffected: 6.6.36 , ≤ 6.6.* (semver)
Unaffected: 6.9.7 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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This holds\\nrtnl_lock, and causes tasks to hang.\\n\\nReturn -EAGAIN to prevent infinite looping, while keeping documented\\nbehavior.\\n\\n[1]\\n\\nINFO: task kworker/1:0:5088 blocked for more than 143 seconds.\\nNot tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0\\n\\\"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\\\" disables this message.\\ntask:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000\\nWorkqueue: events_power_efficient reg_check_chans_work\\nCall Trace:\\n\u003cTASK\u003e\\ncontext_switch kernel/sched/core.c:5409 [inline]\\n__schedule+0xf15/0x5d00 kernel/sched/core.c:6746\\n__schedule_loop kernel/sched/core.c:6823 [inline]\\nschedule+0xe7/0x350 kernel/sched/core.c:6838\\nschedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895\\n__mutex_lock_common kernel/locking/mutex.c:684 [inline]\\n__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752\\nwiphy_lock include/net/cfg80211.h:5953 [inline]\\nreg_leave_invalid_chans net/wireless/reg.c:2466 [inline]\\nreg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.279\", \"versionStartIncluding\": \"4.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.221\", \"versionStartIncluding\": \"4.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.162\", \"versionStartIncluding\": \"4.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.96\", \"versionStartIncluding\": \"4.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.36\", \"versionStartIncluding\": \"4.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.7\", \"versionStartIncluding\": \"4.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"4.19\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:19:36.408Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-40995\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T21:58:59.618Z\", \"dateReserved\": \"2024-07-12T12:17:45.607Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-12T12:37:37.791Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

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.