CVE-2022-50422

HIGH EPSS 4.6%
Published Oct 1, 20259mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Oct 1, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
4.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥2.6.19  –  <5.4.220
linuxlinux_kernel*≥5.5  –  <5.10.150
linuxlinux_kernel*≥5.11  –  <5.15.75
linuxlinux_kernel*≥5.16  –  <5.19.17
linuxlinux_kernel*≥6.0  –  <6.0.3

References 6

  • git.kernel.org https://git.kernel.org/stable/c/117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2e12ce270f0d926085c1209cc90397e307deef97
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/46ba53c30666717cb06c2b3c5d896301cd00d0c0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a9e5176ead6de64f572ad5c87a72825d9d3c82ae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e45a1516d2933703a4823d9db71e17c3abeba24f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f7a785177611ffc97d645fcbc196e6de6ad2421d
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2e12ce270f0d926085c1209cc90397e307deef97
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/46ba53c30666717cb06c2b3c5d896301cd00d0c0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a9e5176ead6de64f572ad5c87a72825d9d3c82ae
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e45a1516d2933703a4823d9db71e17c3abeba24f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f7a785177611ffc97d645fcbc196e6de6ad2421d
    Patch