CVE-2023-54227

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: 1. mount -t configfs configfs /mnt 2. modprobe null_blk nr_devices=0 submit_queues=8 3. mkdir /mnt/nullb/nullb0 4. echo 1 > /mnt/nullb/nullb0/power 5. echo 4 > /mnt/nullb/nullb0/submit_queues 6. 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.

The following products are affected by CVE-2023-54227 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2023-54227.

URL	Resource
https://git.kernel.org/stable/c/c0ef7493e68b8896806a2f598fcffbaa97333405
https://git.kernel.org/stable/c/e1dd7bc93029024af5688253b0c05181d6e01f8e
https://lore.kernel.org/linux-cve-announce/2025123029-CVE-2023-54227-5c6c@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2023-54227
https://www.cve.org/CVERecord?id=CVE-2023-54227