FKIE_CVE-2024-26686

Vulnerability from fkie_nvd - Published: 2024-04-03 15:15 - Updated: 2025-11-03 20:16
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats lock_task_sighand() can trigger a hard lockup. If NR_CPUS threads call do_task_stat() at the same time and the process has NR_THREADS, it will spin with irqs disabled O(NR_CPUS * NR_THREADS) time. Change do_task_stat() to use sig->stats_lock to gather the statistics outside of ->siglock protected section, in the likely case this code will run lockless.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0c35d1914353799c54fa1843fe7dea6fcbcdbac5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3820b0fac7732a653bcc6f6ac20c1d72e697f8f6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4fe85bdaabd63f8f8579b24a10ed597c9c482164
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4dPatch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/proc: do_task_stat: use sig-\u003estats_lock to gather the threads/children stats\n\nlock_task_sighand() can trigger a hard lockup.  If NR_CPUS threads call\ndo_task_stat() at the same time and the process has NR_THREADS, it will\nspin with irqs disabled O(NR_CPUS * NR_THREADS) time.\n\nChange do_task_stat() to use sig-\u003estats_lock to gather the statistics\noutside of -\u003esiglock protected section, in the likely case this code will\nrun lockless."
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs/proc: do_task_stat: use sig-\u0026gt;stats_lock para recopilar las estad\u00edsticas de subprocesos/hijos lock_task_sighand() puede desencadenar un bloqueo completo. Si los subprocesos NR_CPUS llaman a do_task_stat() al mismo tiempo y el proceso tiene NR_THREADS, girar\u00e1 con irqs deshabilitados O(NR_CPUS * NR_THREADS) tiempo. Cambie do_task_stat() para usar sig-\u0026gt;stats_lock para recopilar las estad\u00edsticas fuera de -\u0026gt;secci\u00f3n protegida siglock, en el caso probable de que este c\u00f3digo se ejecute sin bloqueo."
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  "id": "CVE-2024-26686",
  "lastModified": "2025-11-03T20:16:10.460",
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          "attackVector": "LOCAL",
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          "baseScore": 5.5,
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          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
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          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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