CVE-2023-54227
- Source
- https://cve.org/CVERecord?id=CVE-2023-54227
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54227.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2023-54227
- Downstream
- Related
- Published
- 2025-12-30T12:11:20Z
- Modified
- 2026-08-12T03:51:45Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- blk-mq: fix tags leak when shrink nr_hw_queues
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
blk-mq: fix tags leak when shrink nr_hw_queues
Although we don't need to realloc set->tags[] when shrink nr_hw_queues, we need to free them. Or these tags will be leaked.
How to reproduce:
- mount -t configfs configfs /mnt
- modprobe null_blk nr_devices=0 submit_queues=8
- mkdir /mnt/nullb/nullb0
- echo 1 > /mnt/nullb/nullb0/power
- echo 4 > /mnt/nullb/nullb0/submit_queues
- rmdir /mnt/nullb/nullb0
In step 4, will alloc 9 tags (8 submit queues and 1 poll queue), then in step 5, new_nr_hw_queues = 5 (4 submit queues and 1 poll queue). At last in step 6, only these 5 tags are freed, the other 4 tags leaked.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54227.json" }- References
-
- https://git.kernel.org/stable/c/c0ef7493e68b8896806a2f598fcffbaa97333405
- https://git.kernel.org/stable/c/e1dd7bc93029024af5688253b0c05181d6e01f8e
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54227.json
- https://nvd.nist.gov/vuln/detail/CVE-2023-54227
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git