CVE-2022-50485: 
Linux Kernel vulnerability analysis and mitigation

CVE-2022-50485 is a vulnerability in the Linux kernel's ext4 filesystem implementation that was disclosed in October 2025. The issue involves the ext4_iget() function returning bad inodes, specifically when accessing the boot loader inode, which could lead to system instability (NVD).

The vulnerability occurs when ext4_iget() returns a bad inode, particularly during boot loader inode access where the inode may not be initialized. This behavior could be exploited to bypass certain system checks and cause kernel panic. The issue has been assigned a CVSS v3.1 base score of 5.7 with attack vector: Local, attack complexity: High, privileges required: High, user interaction: None, scope: Unchanged, and impact on confidentiality: None, integrity: High, availability: High (Red Hat).

When exploited, this vulnerability can cause system crashes and potential denial of service conditions. The issue specifically affects the ext4 filesystem's inode handling mechanism, which could lead to system instability and kernel panic when certain checks are bypassed (NVD).

A fix has been implemented by adding a special iget flag called EXT4IGETBAD. With this flag, bad inodes are only returned from ext4_iget() when explicitly requested; otherwise, an error code is returned if the inode is bad. This solution was suggested by Jan Kara and has been incorporated into kernel updates (NVD).