In the Linux kernel, the following vulnerability has been resolved:
posix-cpu-timers: Cleanup CPU timers before freeing them during exec
Commit 55e8c8eb2c7b ("posix-cpu-timers: Store a reference to a pid not a
task") started looking up tasks by PID when deleting a CPU timer.
When a non-leader thread calls execve, it will switch PIDs with the leader
process. Then, as it calls exit_itimers, posix_cpu_timer_del cannot find
the task because the timer still points out to the old PID.
That means that armed timers won't be disarmed, that is, they won't be
removed from the timerqueue_list. exit_itimers will still release their
memory, and when that list is later processed, it leads to a
use-after-free.
Clean up the timers from the de-threaded task before freeing them. This
prevents a reported use-after-free.
References
Configurations
Configuration 1 (hide)
|
History
18 Nov 2025, 02:45
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-416 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/541840859ace9c2ccebc32fa9e376c7bd3def490 - Patch | |
| References | () https://git.kernel.org/stable/c/9e255ed238fc67058df87b0388ad6d4b2ef3a2bd - Patch | |
| References | () https://git.kernel.org/stable/c/b2fc1723eb65abb83e00d5f011de670296af0b28 - Patch | |
| References | () https://git.kernel.org/stable/c/e362359ace6f87c201531872486ff295df306d13 - Patch | |
| References | () https://git.kernel.org/stable/c/e8cb6e8fd9890780f1bfcf5592889e1b879e779c - Patch |
Information
Published : 2025-06-18 11:15
Updated : 2025-11-18 02:45
NVD link : CVE-2022-50095
Mitre link : CVE-2022-50095
CVE.ORG link : CVE-2022-50095
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free