Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.15, < 5.15.31 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/60c2c8e2ef3a3ec79de8cbc80a06ca0c21df8c29Patch
- https://git.kernel.org/stable/c/d4ad8736ac982111bb0be8306bf19c8207f6600ePatch
- https://git.kernel.org/stable/c/daaca3522a8e67c46e39ef09c1d542e866f85f3bPatch
- https://git.kernel.org/stable/c/60c2c8e2ef3a3ec79de8cbc80a06ca0c21df8c29Patch
- https://git.kernel.org/stable/c/d4ad8736ac982111bb0be8306bf19c8207f6600ePatch
- https://git.kernel.org/stable/c/daaca3522a8e67c46e39ef09c1d542e866f85f3bPatch
FAQ
What is CVE-2022-48846?
CVE-2022-48846 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 ...
How severe is CVE-2022-48846?
CVE-2022-48846 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-48846?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.