CVE-2026-43209

A flaw was found in the Linux kernel's minix filesystem implementation. The minix_check_superblock() function lacks proper sanity checks for superblock fields, including s_log_zone_size. This oversight could allow a local attacker to craft a malicious minix filesystem that, when mounted, may lead to a system crash or corruption, resulting in a Denial of Service (DoS).

Red Hat acknowledges the upstream Linux kernel correction for «minix» as described in COMMENT_ZERO. Fixes are delivered through standard kernel errata for supported products. Operational exposure depends on whether this subsystem or driver is active in your configuration.

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.