CVE-2026-80739

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

Description An AA deadlock occurs in the Linux kernel when mlx5e add fdb flow() fails in lower levels. The failure triggers the deletion of the flow via mlx5e tc del flow(), which acquires the ESW devcom lock unconditionally. Because mlx5e add fdb flow() is already called while holding the ESW devcom comp lock in the case of a peer flow, a recursive locking scenario is created, leading to a system deadlock.

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