7.4

CVE-2025-38352

Warnung
Medienbericht
Exploit

posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del()

In the Linux kernel, the following vulnerability has been resolved:

posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del()

If an exiting non-autoreaping task has already passed exit_notify() and
calls handle_posix_cpu_timers() from IRQ, it can be reaped by its parent
or debugger right after unlock_task_sighand().

If a concurrent posix_cpu_timer_del() runs at that moment, it won't be
able to detect timer->it.cpu.firing != 0: cpu_timer_task_rcu() and/or
lock_task_sighand() will fail.

Add the tsk->exit_state check into run_posix_cpu_timers() to fix this.

This fix is not needed if CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y, because
exit_task_work() is called before exit_notify(). But the check still
makes sense, task_work_add(&tsk->posix_cputimers_work.work) will fail
anyway in this case.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.36 < 5.4.295
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.239
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.186
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.142
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.94
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.34
Linux ≫ Linux Kernel Version >= 6.13 < 6.15.3
Linux ≫ Linux Kernel Version6.16 Updaterc1
Debian ≫ Debian Linux Version11.0
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login

04.09.2025: CISA Known Exploited Vulnerabilities (KEV) Catalog

Linux Kernel Time-of-Check Time-of-Use (TOCTOU) Race Condition Vulnerability

Schwachstelle

Linux kernel contains a time-of-check time-of-use (TOCTOU) race condition vulnerability that has a high impact on confidentiality, integrity, and availability.

Beschreibung

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Erforderliche Maßnahmen
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.35% 0.677
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.4 1.4 5.9
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

Für Zugriff zu Vulnerability Intelligence ist ein VulnDex Zugang erforderlich.
VulnDex Intel
Media Report
09.09.2025 23:36
Für Zugriff zu Vulnerability Intelligence ist ein VulnDex Zugang erforderlich.
VulnDex Intel
Media Report
05.09.2025 08:51
https://git.kernel.org/stable/c/2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff
Patch
https://git.kernel.org/stable/c/2f3daa04a9328220de46f0d5c919a6c0073a9f0b
Patch
https://git.kernel.org/stable/c/460188bc042a3f40f72d34b9f7fc6ee66b0b757b
Patch
https://git.kernel.org/stable/c/764a7a5dfda23f69919441f2eac2a83e7db6e5bb
Patch
https://git.kernel.org/stable/c/78a4b8e3795b31dae58762bc091bb0f4f74a2200
Patch
https://git.kernel.org/stable/c/c076635b3a42771ace7d276de8dc3bc76ee2ba1b
Patch
https://git.kernel.org/stable/c/c29d5318708e67ac13c1b6fc1007d179fb65b4d7
Patch
https://git.kernel.org/stable/c/f90fff1e152dedf52b932240ebbd670d83330eca
Patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-38352
US Government Resource
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
Third Party Advisory
Mailing List
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Third Party Advisory
Mailing List
https://github.com/farazsth98/chronomaly
Exploit