CVE-2026-72340

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

Description A race condition exists in the microchip vcap implementation where VCAP instances on a chip are locked independently despite sharing the same Super VCAP hardware block, including the VCAP SUPER CTRL register and cache registers. This occurs specifically on sparx5 and lan969x. Because the per-instance admin->lock cannot prevent concurrent access to the shared hardware, a rule dump in debugfs (which runs outside rtnl) can race with a concurrent tc-flower rule write to another Super VCAP instance. This can lead to corrupted dumps and hardware entry corruption, as the read operation may repopulate the shared cache between a writer's cache fill and its write command, causing the writer to commit incorrect data.

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