William Zhao

**Name of the Vulnerable Software and Affected Versions** Linux kernel (affected versions not specified) **Description** A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration, such as redirecting egress packets to ingress using TC action "mirred", a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use, like TCP or SCTP, does a retransmission, resulting in a denial of service condition. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.