CVE-2021-47412

A vulnerability was found in the Linux kernel, where improper handling of block I/O requests when a block I/O request (bio) is not tracked, the kernel erroneously calls the rq_qos_ops->done_bio function, potentially leading to use-after-free issues. This situation can occurr when the request queue is accessed after it has been freed, resulting in possible kernel panic.

This vulnerability is classified as moderate severity, as the issue can cause kernel panics, leading to system crashes. However, it does not affect data confidentiality or integrity.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.