# CVE-2022-50422: linux: In the Linux kernel, the following vulnerability has been resolved:  scsi: libsas: Fix use-after-free bug in smp_exec...

CVE-2022-50422 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50422, released October 1, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-50422
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 1, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.3-1 | [DEBIAN-CVE-2022-50422](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50422.md) | Oct 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.3-1 | [DEBIAN-CVE-2022-50422](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50422.md) | Oct 1, 2025 |
| Linux | linux Debian 14 | 6.0.3-1 | [DEBIAN-CVE-2022-50422](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50422.md) | Oct 1, 2025 |

---

Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.