CVE-2023-53421

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel where the blkg iostat set structure is not properly re-initialized after being cleared in the blkcg reset stats() function. This occurs when blkg alloc() is called to allocate a blkcg gq structure. Specifically, the blkg and sync fields within blkg iostat set require initialization, which is missed during the clearing process. This can lead to a kernel panic due to a NULL pointer access of the blkg pointer, and potentially issues with lockdep initialization in debug kernels due to the missing sync initialization.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.