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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2022-50422 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe kernel.org
https://git.kernel.org/stable/c/2e12ce270f0d926085c1209cc90397e307deef97 kernel.org
https://git.kernel.org/stable/c/46ba53c30666717cb06c2b3c5d896301cd00d0c0 kernel.org
https://git.kernel.org/stable/c/a9e5176ead6de64f572ad5c87a72825d9d3c82ae kernel.org
https://git.kernel.org/stable/c/e45a1516d2933703a4823d9db71e17c3abeba24f kernel.org
https://git.kernel.org/stable/c/f7a785177611ffc97d645fcbc196e6de6ad2421d kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-50422
NVD Published Date:
10/01/2025
NVD Last Modified:
10/01/2025
Source:
kernel.org