{"id":"CVE-2025-38352","title":"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 ha…","summary":"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 ha…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-367","CWE-362"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 2.6.36, < 5.4.295","linux_kernel >= 5.5, < 5.10.239","linux_kernel >= 5.11, < 5.15.186","linux_kernel >= 5.16, < 6.1.142","linux_kernel >= 6.2, < 6.6.94","linux_kernel >= 6.7, < 6.12.34","linux_kernel >= 6.13, < 6.15.3","linux_kernel = 6.16","debian_linux = 11.0"],"patched":["linux_kernel 6.15.3"],"published":"2025-07-22","updated":"2026-09-08","sourceUpdated":"2026-09-08T18:17:32.447","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-38352","references":[{"url":"https://git.kernel.org/stable/c/2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2f3daa04a9328220de46f0d5c919a6c0073a9f0b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/460188bc042a3f40f72d34b9f7fc6ee66b0b757b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/764a7a5dfda23f69919441f2eac2a83e7db6e5bb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/78a4b8e3795b31dae58762bc091bb0f4f74a2200","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c076635b3a42771ace7d276de8dc3bc76ee2ba1b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c29d5318708e67ac13c1b6fc1007d179fb65b4d7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f90fff1e152dedf52b932240ebbd670d83330eca","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/farazsth98/chronomaly","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-38352","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38352.json"},{"url":"https://access.redhat.com/security/cve/CVE-2025-38352"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2382581"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-38352"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38352"},{"url":"https://lore.kernel.org/linux-cve-announce/2025072229-CVE-2025-38352-f1de@gregkh/T"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog"},{"url":"https://access.redhat.com/errata/RHSA-2025:15648"},{"url":"https://access.redhat.com/errata/RHSA-2025:15646"},{"url":"https://access.redhat.com/errata/RHSA-2025:15662"},{"url":"https://access.redhat.com/errata/RHSA-2025:15670"},{"url":"https://access.redhat.com/errata/RHSA-2025:15669"},{"url":"https://access.redhat.com/errata/RHSA-2025:15668"},{"url":"https://access.redhat.com/errata/RHSA-2025:15661"},{"url":"https://access.redhat.com/errata/RHSA-2025:15471"},{"url":"https://access.redhat.com/errata/RHSA-2025:15921"},{"url":"https://access.redhat.com/errata/RHSA-2025:15656"},{"url":"https://access.redhat.com/errata/RHSA-2025:15660"},{"url":"https://access.redhat.com/errata/RHSA-2025:15647"},{"url":"https://access.redhat.com/errata/RHSA-2025:16045"},{"url":"https://access.redhat.com/errata/RHSA-2025:15649"},{"url":"https://access.redhat.com/errata/RHSA-2025:16008"},{"url":"https://access.redhat.com/errata/RHSA-2025:15933"},{"url":"https://access.redhat.com/errata/RHSA-2025:15931"},{"url":"https://access.redhat.com/errata/RHSA-2025:15932"},{"url":"https://access.redhat.com/errata/RHSA-2025:15798"},{"url":"https://access.redhat.com/errata/RHSA-2025:15472"},{"url":"https://access.redhat.com/errata/RHSA-2025:15658"},{"url":"https://access.redhat.com/errata/RHSA-2025:15657"}],"tags":["nvd","kev","in-the-wild","exploit-available","cve.org","csaf","vex","red-hat"],"epss":0.01297,"epssPercentile":0.68635,"kev":true,"kevDateAdded":"2025-09-04","kevDueDate":"2025-09-25","kevRansomware":false,"exploited":true,"exploits":{"github":6,"githubRepos":["https://github.com/farazsth98/poc-CVE-2025-38352","https://github.com/farazsth98/chronomaly","https://github.com/Crime2/poc-CVE-2025-38352"],"checkedAt":"2026-09-21T15:27:24.150Z"},"exploitAvailable":true,"ssvc":{"exploitation":"active","automatable":"no","technicalImpact":"total","timestamp":"2025-09-05T03:55:31.566379Z"},"ingestedAt":"2026-07-31T06:58:50.977Z","scores":{"nvd":7.8,"vendor":7},"slug":"CVE-2025-38352","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `linux_kernel >= 2.6.36, < 5.4.295`\n- `linux_kernel >= 5.5, < 5.10.239`\n- `linux_kernel >= 5.11, < 5.15.186`\n- `linux_kernel >= 5.16, < 6.1.142`\n- `linux_kernel >= 6.2, < 6.6.94`\n- `linux_kernel >= 6.7, < 6.12.34`\n- `linux_kernel >= 6.13, < 6.15.3`\n- `linux_kernel = 6.16`\n- `debian_linux = 11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.15.3`\n\n## Vendor advisories\n\n- **RHSA-2025:15648** · Red Hat · fixed in: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · released 2025-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2025:15648)\n- **RHSA-2025:15646** · Red Hat · fixed in: Red Hat Enterprise Linux for Real Time (v. 7 ELS) · released 2025-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2025:15646)\n- **RHSA-2025:15662** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), Red Hat Enterprise Linux Real Time (v. 10) · released 2025-09-11 · [advisory](https://access.redhat.com/errata/RHSA-2025:15662)\n- **RHSA-2025:15670** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.0), Red Hat Enterprise Linux BaseOS E4S (v.9.0) · released 2025-09-11 · [advisory](https://access.redhat.com/errata/RHSA-2025:15670)\n- **RHSA-2025:15669** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2) · released 2025-09-11 · [advisory](https://access.redhat.com/errata/RHSA-2025:15669)\n- **RHSA-2025:15668** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux BaseOS EUS (v.9.4), Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4), Red Hat Enterprise Linux Real Time EUS (v.9.4) · released 2025-09-11 · [advisory](https://access.redhat.com/errata/RHSA-2025:15668)\n- **RHSA-2025:15661** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2025-09-11 · [advisory](https://access.redhat.com/errata/RHSA-2025:15661)\n- **RHSA-2025:15471** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2025-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2025:15471)\n- **RHSA-2025:15921** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8) · released 2025-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2025:15921)\n- **RHSA-2025:15656** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS AUS (v. 8.2) · released 2025-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2025:15656)\n- **RHSA-2025:15660** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) · released 2025-09-11 · [advisory](https://access.redhat.com/errata/RHSA-2025:15660)","depth":"abyssal","depthScore":68,"depthScoreParts":{"impact":42.9,"likelihood":0.3,"exploitation":25,"ransomware":0},"changes":[{"seq":4819,"id":"CVE-2025-38352","ts":1788887208596,"field":"exploit_available","old":"false","new":"true"},{"seq":3702,"id":"CVE-2025-38352","ts":1788886325658,"field":"exploit_available","old":"true","new":"false"},{"seq":2547,"id":"CVE-2025-38352","ts":1788883007247,"field":"exploit_available","old":"false","new":"true"},{"seq":1576,"id":"CVE-2025-38352","ts":1788882407454,"field":"exploit_available","old":"true","new":"false"},{"seq":690,"id":"CVE-2025-38352","ts":1788881844674,"field":"exploit_available","old":"false","new":"true"}]}