CVE-2022-50422
scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 2908d778ab3e244900c310974e1fc1c69066e450 – < 117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe
- affected 2908d778ab3e244900c310974e1fc1c69066e450 – < a9e5176ead6de64f572ad5c87a72825d9d3c82ae
- affected 2908d778ab3e244900c310974e1fc1c69066e450 – < e45a1516d2933703a4823d9db71e17c3abeba24f
- affected 2908d778ab3e244900c310974e1fc1c69066e450 – < f7a785177611ffc97d645fcbc196e6de6ad2421d
- affected 2908d778ab3e244900c310974e1fc1c69066e450 – < 2e12ce270f0d926085c1209cc90397e307deef97
- affected 2908d778ab3e244900c310974e1fc1c69066e450 – < 46ba53c30666717cb06c2b3c5d896301cd00d0c0
- affected 2.6.19
- unaffected < 2.6.19
- unaffected 5.4.220 – ≤ 5.4.*
- unaffected 5.10.150 – ≤ 5.10.*
- unaffected 5.15.75 – ≤ 5.15.*
- unaffected 5.19.17 – ≤ 5.19.*
- unaffected 6.0.3 – ≤ 6.0.*
- unaffected 6.1 – ≤ *
References (6)
- https://git.kernel.org/stable/c/117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe (opens in a new tab)
- https://git.kernel.org/stable/c/a9e5176ead6de64f572ad5c87a72825d9d3c82ae (opens in a new tab)
- https://git.kernel.org/stable/c/e45a1516d2933703a4823d9db71e17c3abeba24f (opens in a new tab)
- https://git.kernel.org/stable/c/f7a785177611ffc97d645fcbc196e6de6ad2421d (opens in a new tab)
- https://git.kernel.org/stable/c/2e12ce270f0d926085c1209cc90397e307deef97 (opens in a new tab)
- https://git.kernel.org/stable/c/46ba53c30666717cb06c2b3c5d896301cd00d0c0 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-50422)Record last updated .