In the Linux kernel, the following vulnerability has been resolved:
scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()
When executing SMP task failed, the smp_execute_task_sg() calls del_timer()
to delete "slow_task->timer". However, if the timer handler
sas_task_internal_timedout() is running, the del_timer() in
smp_execute_task_sg() will not stop it and a UAF will happen. The process
is shown below:
(thread 1) | (thread 2)
smp_execute_task_sg() | sas_task_internal_timedout()
... |
del_timer() |
... | ...
sas_free_task(task) |
kfree(task->slow_task) //FREE|
| task->slow_task->... //USE
Fix by calling del_timer_sync() in smp_execute_task_sg(), which makes sure
the timer handler have finished before the "task->slow_task" is
deallocated.
References
Configurations
Configuration 1 (hide)
|
History
11 Dec 2025, 18:24
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-416 | |
| First Time |
Linux
Linux linux Kernel |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| References | () https://git.kernel.org/stable/c/117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe - Patch | |
| References | () https://git.kernel.org/stable/c/2e12ce270f0d926085c1209cc90397e307deef97 - Patch | |
| References | () https://git.kernel.org/stable/c/46ba53c30666717cb06c2b3c5d896301cd00d0c0 - Patch | |
| References | () https://git.kernel.org/stable/c/a9e5176ead6de64f572ad5c87a72825d9d3c82ae - Patch | |
| References | () https://git.kernel.org/stable/c/e45a1516d2933703a4823d9db71e17c3abeba24f - Patch | |
| References | () https://git.kernel.org/stable/c/f7a785177611ffc97d645fcbc196e6de6ad2421d - Patch |
01 Oct 2025, 12:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-01 12:15
Updated : 2025-12-11 18:24
NVD link : CVE-2022-50422
Mitre link : CVE-2022-50422
CVE.ORG link : CVE-2022-50422
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free