CVE-2026-43100

A flaw was found in the Linux kernel's bridge module. A local user can trigger a null pointer dereference by creating a bridge with specific configuration options. This vulnerability can lead to a system crash, resulting in a Denial of Service (DoS).

Red Hat acknowledges the upstream Linux kernel correction for «bridge» 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.

To mitigate this issue, prevent the bridge module from being loaded. See https://access.redhat.com/solutions/41278 for instructions.