CVE-2026-63988

A flaw was found in the Linux kernel's bridge module. A local user, by interacting with the sysfs path for bridge port attributes, could trigger a 'sleep in atomic context' issue. This occurs because the brport_store() function, while holding a lock that requires an atomic context, calls a function that can sleep. This can lead to a kernel crash, resulting in a Denial of Service (DoS).

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.