CVE-2023-53848

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

Description A deadlock situation exists within the r5l exit log() function in the md/raid5-cache component of the Linux kernel. This issue stems from a commit (b13015af94cf) intended to clear the conf->log pointer, which inadvertently created a deadlock condition. Specifically, the wait event() function within r5c disable writeback async() could indefinitely wait because conf->log was not NULL, and mddev trylock() would fail. The fix involves setting config->log to NULL before the wake up() call, restoring the previous behavior and allowing the wait event() to proceed. The fix also moves forward md unregister thread() to address a null-pointer dereference.

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