CVE-2022-50668

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

Description A flaw exists in the Linux kernel related to ext4 filesystem handling of extended attributes (xattrs). A deadlock situation can occur during manipulation of xattr blocks due to mbcache entry corruption. This happens when attempting to reuse xattr blocks, where the system continuously searches for a reusable block but fails due to an inconsistent reference count caused by a non-atomic update of the e reusable bit within a bitfield. This inconsistency arises from a race condition with the e referenced bit update. The issue was exacerbated by a prior commit (65f8b80053a1) intended to address a related race condition. The ext4 xattr block set() function is involved in this process.

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