CVE-2024-41023 (GCVE-0-2024-41023)

Vulnerability from cvelistv5 – Published: 2024-07-29 14:31 – Updated: 2026-05-23 15:51
VLAI
Title
sched/deadline: Fix task_struct reference leak
Summary
In the Linux kernel, the following vulnerability has been resolved: sched/deadline: Fix task_struct reference leak During the execution of the following stress test with linux-rt: stress-ng --cyclic 30 --timeout 30 --minimize --quiet kmemleak frequently reported a memory leak concerning the task_struct: unreferenced object 0xffff8881305b8000 (size 16136): comm "stress-ng", pid 614, jiffies 4294883961 (age 286.412s) object hex dump (first 32 bytes): 02 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .@.............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ debug hex dump (first 16 bytes): 53 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 S............... backtrace: [<00000000046b6790>] dup_task_struct+0x30/0x540 [<00000000c5ca0f0b>] copy_process+0x3d9/0x50e0 [<00000000ced59777>] kernel_clone+0xb0/0x770 [<00000000a50befdc>] __do_sys_clone+0xb6/0xf0 [<000000001dbf2008>] do_syscall_64+0x5d/0xf0 [<00000000552900ff>] entry_SYSCALL_64_after_hwframe+0x6e/0x76 The issue occurs in start_dl_timer(), which increments the task_struct reference count and sets a timer. The timer callback, dl_task_timer, is supposed to decrement the reference count upon expiration. However, if enqueue_task_dl() is called before the timer expires and cancels it, the reference count is not decremented, leading to the leak. This patch fixes the reference leak by ensuring the task_struct reference count is properly decremented when the timer is canceled.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: feff2e65efd8d84cf831668e182b2ce73c604bbb , < 7a54d31face626f62de415ebe77b43f76c3ffaf4 (git)
Affected: feff2e65efd8d84cf831668e182b2ce73c604bbb , < b58652db66c910c2245f5bee7deca41c12d707b9 (git)
Affected: f0e1c1d8ff908a39dd42e723d08f104505dfa601 (git)
Affected: 184c8ab5342450c4ae6fc5d937f9bb06c620dcf1 (git)
Affected: 4.19.257 , < 4.20 (semver)
Affected: 5.4.212 , < 5.5 (semver)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 6.9.10 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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      "id": "CVE-2024-41023",
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The timer callback, dl_task_timer,\\nis supposed to decrement the reference count upon expiration. However,\\nif enqueue_task_dl() is called before the timer expires and cancels it,\\nthe reference count is not decremented, leading to the leak.\\n\\nThis patch fixes the reference leak by ensuring the task_struct\\nreference count is properly decremented when the timer is canceled.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: sched/deadline: Reparar fuga de referencia de task_struct Durante la ejecuci\u00f3n de la siguiente prueba de estr\u00e9s con linux-rt: estr\u00e9s-ng --ciclic 30 --timeout 30 --minimize --quiet kmemleak inform\u00f3 con frecuencia una p\u00e9rdida de memoria relacionada con task_struct: objeto sin referencia 0xffff8881305b8000 (tama\u00f1o 16136): comm \\\"stress-ng\\\", pid 614, jiffies 4294883961 (edad 286.412 s) volcado hexadecimal de objeto (primeros 32 bytes): 02 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .@.............. 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ volcado hexadecimal de depuraci\u00f3n (primeros 16 bytes): 53 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 S............... rastreo inverso : [\u0026lt;00000000046b6790\u0026gt;] dup_task_struct+0x30/0x540 [\u0026lt;00000000c5ca0f0b\u0026gt;] copy_process+0x3d9/0x50e0 [\u0026lt;00000000ced59777\u0026gt;] kernel_clone+0xb0/0x770 [\u0026lt;00000000a50befd c\u0026gt;] __do_sys_clone+0xb6/0xf0 [\u0026lt;000000001dbf2008\u0026gt;] do_syscall_64+0x5d/ 0xf0 [\u0026lt;00000000552900ff\u0026gt;] Entry_SYSCALL_64_after_hwframe+0x6e/0x76 El problema ocurre en start_dl_timer(), que incrementa el recuento de referencias de task_struct y establece un temporizador. 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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/7a54d31face626f62de415ebe77b43f76c3ffaf4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/b58652db66c910c2245f5bee7deca41c12d707b9\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:39:56.070Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-41023\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:24:19.073103Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:20.532Z\"}}], \"cna\": {\"title\": \"sched/deadline: Fix task_struct reference leak\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"feff2e65efd8d84cf831668e182b2ce73c604bbb\", \"lessThan\": \"7a54d31face626f62de415ebe77b43f76c3ffaf4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"feff2e65efd8d84cf831668e182b2ce73c604bbb\", \"lessThan\": \"b58652db66c910c2245f5bee7deca41c12d707b9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"f0e1c1d8ff908a39dd42e723d08f104505dfa601\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"184c8ab5342450c4ae6fc5d937f9bb06c620dcf1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4.19.257\", \"lessThan\": \"4.20\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.4.212\", \"lessThan\": \"5.5\", \"versionType\": \"semver\"}], \"programFiles\": [\"kernel/sched/deadline.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.9.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"kernel/sched/deadline.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/7a54d31face626f62de415ebe77b43f76c3ffaf4\"}, {\"url\": \"https://git.kernel.org/stable/c/b58652db66c910c2245f5bee7deca41c12d707b9\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsched/deadline: Fix task_struct reference leak\\n\\nDuring the execution of the following stress test with linux-rt:\\n\\nstress-ng --cyclic 30 --timeout 30 --minimize --quiet\\n\\nkmemleak frequently reported a memory leak concerning the task_struct:\\n\\nunreferenced object 0xffff8881305b8000 (size 16136):\\n  comm \\\"stress-ng\\\", pid 614, jiffies 4294883961 (age 286.412s)\\n  object hex dump (first 32 bytes):\\n    02 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00  .@..............\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n  debug hex dump (first 16 bytes):\\n    53 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00  S...............\\n  backtrace:\\n    [\u003c00000000046b6790\u003e] dup_task_struct+0x30/0x540\\n    [\u003c00000000c5ca0f0b\u003e] copy_process+0x3d9/0x50e0\\n    [\u003c00000000ced59777\u003e] kernel_clone+0xb0/0x770\\n    [\u003c00000000a50befdc\u003e] __do_sys_clone+0xb6/0xf0\\n    [\u003c000000001dbf2008\u003e] do_syscall_64+0x5d/0xf0\\n    [\u003c00000000552900ff\u003e] entry_SYSCALL_64_after_hwframe+0x6e/0x76\\n\\nThe issue occurs in start_dl_timer(), which increments the task_struct\\nreference count and sets a timer. The timer callback, dl_task_timer,\\nis supposed to decrement the reference count upon expiration. However,\\nif enqueue_task_dl() is called before the timer expires and cancels it,\\nthe reference count is not decremented, leading to the leak.\\n\\nThis patch fixes the reference leak by ensuring the task_struct\\nreference count is properly decremented when the timer is canceled.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.10\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.19.257\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.4.212\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-23T15:51:32.209Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-41023\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-23T15:51:32.209Z\", \"dateReserved\": \"2024-07-12T12:17:45.615Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-29T14:31:40.439Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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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.