CVE-2022-48846
MEDIUM EPSS 12.3%
Published Jul 16, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Published Jul 16, 2024 1y ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
12.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-401
Affected Products 2
References 3
- git.kernel.org https://git.kernel.org/stable/c/60c2c8e2ef3a3ec79de8cbc80a06ca0c21df8c29
- git.kernel.org https://git.kernel.org/stable/c/d4ad8736ac982111bb0be8306bf19c8207f6600e
- git.kernel.org https://git.kernel.org/stable/c/daaca3522a8e67c46e39ef09c1d542e866f85f3b
Remediation
- git.kernel.org https://git.kernel.org/stable/c/60c2c8e2ef3a3ec79de8cbc80a06ca0c21df8c29
- git.kernel.org https://git.kernel.org/stable/c/d4ad8736ac982111bb0be8306bf19c8207f6600e
- git.kernel.org https://git.kernel.org/stable/c/daaca3522a8e67c46e39ef09c1d542e866f85f3b