CVE-2025-38352

HIGH CISA KEV EPSS 67.9%
Published Jul 22, 202511mo ago · Modified Jun 17, 20261w ago
7.4 CVSS 3.1
High
Find Similar
Published Jul 22, 2025 11mo ago
Last Modified Jun 17, 2026 1w ago
KEV Listed Sep 4, 2025 9mo ago
KEV Due Sep 25, 2025 278d overdue

Description

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.

CVSS Details

Base Score
7.4
Exploitability
1.4
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

CISA Known Exploited Overdue 278d
Added
Sep 4, 2025
Due
Sep 25, 2025

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

EPSS Exploit Probability
67.9% percentile
Exploit & Patch Status
Actively Exploited (KEV)
Patch Available

Weaknesses 1

CWE-367

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥2.6.36  –  <5.4.295
linuxlinux_kernel*≥5.5  –  <5.10.239
linuxlinux_kernel*≥5.11  –  <5.15.186
linuxlinux_kernel*≥5.16  –  <6.1.142
linuxlinux_kernel*≥6.2  –  <6.6.94
linuxlinux_kernel*≥6.7  –  <6.12.34
linuxlinux_kernel*≥6.13  –  <6.15.3
linuxlinux_kernel6.16any
debiandebian_linux11.0any

References 12

  • git.kernel.org https://git.kernel.org/stable/c/2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2f3daa04a9328220de46f0d5c919a6c0073a9f0b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/460188bc042a3f40f72d34b9f7fc6ee66b0b757b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/764a7a5dfda23f69919441f2eac2a83e7db6e5bb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78a4b8e3795b31dae58762bc091bb0f4f74a2200
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c076635b3a42771ace7d276de8dc3bc76ee2ba1b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c29d5318708e67ac13c1b6fc1007d179fb65b4d7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f90fff1e152dedf52b932240ebbd670d83330eca
    Patch
  • github.com https://github.com/farazsth98/chronomaly
    Exploit
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Mailing ListThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Mailing ListThird Party Advisory
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-38352
    US Government Resource

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2f3daa04a9328220de46f0d5c919a6c0073a9f0b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/460188bc042a3f40f72d34b9f7fc6ee66b0b757b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/764a7a5dfda23f69919441f2eac2a83e7db6e5bb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78a4b8e3795b31dae58762bc091bb0f4f74a2200
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c076635b3a42771ace7d276de8dc3bc76ee2ba1b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c29d5318708e67ac13c1b6fc1007d179fb65b4d7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f90fff1e152dedf52b932240ebbd670d83330eca
    Patch