{"id":"CVE-2025-38352","aliases":["A-425282960","ASB-A-425282960"],"url":"https://o3.security/vulnerability/CVE-2025-38352","summary":"posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nposix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del()\n\nIf an exiting non-autoreaping task has already passed exit_notify() and\ncalls handle_posix_cpu_timers() from IRQ, it can be reaped by its parent\nor debugger right after unlock_task_sighand().\n\nIf a concurrent posix_cpu_timer_del() runs at that moment, it won't be\nable to detect timer->it.cpu.firing != 0: cpu_timer_task_rcu() and/or\nlock_task_sighand() will fail.\n\nAdd the tsk->exit_state check into run_posix_cpu_timers() to fix this.\n\nThis fix is not needed if CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y, because\nexit_task_work() is called before exit_notify(). But the check still\nmakes sense, task_work_add(&tsk->posix_cputimers_work.work) will fail\nanyway in this case.","published":"2025-07-22T08:04:25.277Z","modified":"2026-08-12T03:51:16.885854003Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.01278,"percentile":0.68098,"asOf":"2026-09-08"},"cisaKev":null,"exploitsKnown":3,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.4.295"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2f3daa04a9328220de46f0d5c919a6c0073a9f0b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/460188bc042a3f40f72d34b9f7fc6ee66b0b757b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/764a7a5dfda23f69919441f2eac2a83e7db6e5bb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/78a4b8e3795b31dae58762bc091bb0f4f74a2200"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c076635b3a42771ace7d276de8dc3bc76ee2ba1b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c29d5318708e67ac13c1b6fc1007d179fb65b4d7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f90fff1e152dedf52b932240ebbd670d83330eca"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-38352"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38352.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38352"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"EVIDENCE","url":"https://github.com/farazsth98/chronomaly"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:16.885854003Z"}}