CVE-2025-38352

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Source
https://cve.org/CVERecord?id=CVE-2025-38352
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38352.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38352
Downstream
Related
Published
2025-07-22T08:04:25.277Z
Modified
2026-03-20T12:42:48.865615Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
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:

posix-cpu-timers: fix race between handleposixcputimers() and posixcputimerdel()

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

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

Add the tsk->exitstate check into runposixcputimers() to fix this.

This fix is not needed if CONFIGPOSIXCPUTIMERSTASKWORK=y, because exittaskwork() is called before exitnotify(). But the check still makes sense, taskworkadd(&tsk->posixcputimerswork.work) will fail anyway in this case.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38352.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
0bdd2ed4138ec04e09b4f8165981efc99e439f55
Fixed
78a4b8e3795b31dae58762bc091bb0f4f74a2200
Fixed
c076635b3a42771ace7d276de8dc3bc76ee2ba1b
Fixed
2f3daa04a9328220de46f0d5c919a6c0073a9f0b
Fixed
764a7a5dfda23f69919441f2eac2a83e7db6e5bb
Fixed
2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff
Fixed
c29d5318708e67ac13c1b6fc1007d179fb65b4d7
Fixed
460188bc042a3f40f72d34b9f7fc6ee66b0b757b
Fixed
f90fff1e152dedf52b932240ebbd670d83330eca

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38352.json"