CVE-2022-48846
block: release rq qos structures for queue without disk
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: block: release rq qos structures for queue without disk blkcg_init_queue() may add rq qos structures to request queue, previously blk_cleanup_queue() calls rq_qos_exit() to release them, but commit 8e141f9eb803 ("block: drain file system I/O on del_gendisk") moves rq_qos_exit() into del_gendisk(), so memory leak is caused because queues may not have disk, such as un-present scsi luns, nvme admin queue, ... Fixes the issue by adding rq_qos_exit() to blk_cleanup_queue() back. BTW, v5.18 won't need this patch any more since we move blkcg_init_queue()/blkcg_exit_queue() into disk allocation/release handler, and patches have been in for-5.18/block.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 8e141f9eb803e209714a80aa6ec073893f94c526 – < d4ad8736ac982111bb0be8306bf19c8207f6600e
- affected 8e141f9eb803e209714a80aa6ec073893f94c526 – < 60c2c8e2ef3a3ec79de8cbc80a06ca0c21df8c29
- affected 8e141f9eb803e209714a80aa6ec073893f94c526 – < daaca3522a8e67c46e39ef09c1d542e866f85f3b
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.31 – ≤ 5.15.*
- unaffected 5.16.17 – ≤ 5.16.*
- unaffected 5.17 – ≤ *
References (3)
- https://git.kernel.org/stable/c/d4ad8736ac982111bb0be8306bf19c8207f6600e (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/60c2c8e2ef3a3ec79de8cbc80a06ca0c21df8c29 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/daaca3522a8e67c46e39ef09c1d542e866f85f3b (opens in a new tab)x_transferred
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-2022-48846)Record last updated .