cve-2024-26686
Vulnerability from cvelistv5
Published
2024-04-03 14:54
Modified
2024-08-02 00:14
Severity
Summary
fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats
References
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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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"title": "fs/proc: do_task_stat: use sig-\u003estats_lock to gather the threads/children stats",
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"nvd": "{\"cve\":{\"id\":\"CVE-2024-26686\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-03T15:15:52.263\",\"lastModified\":\"2024-04-03T17:24:18.150\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"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.\"},{\"lang\":\"es\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/27978243f165b44e342f28f449b91327944ea071\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7601df8031fd67310af891897ef6cc0df4209305\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf4b8c39b9a0bd81c47afc7ef62914a62dd5ec4d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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