CVE-2021-47379

A vulnerability was found in the Linux kernel's blk-cgroup subsystem, where a use-after-free error occured when the kernel may incorrectly access memory after it has been freed. This happens when certain operations on block group data structures are not properly synchronized, allowing other processes to use memory that has already been deallocated, potentially causing system crashes or instability.

This vulnerability is rated as a moderate severity because it can lead to crashes due to invalid memory access, it does not directly compromise 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.