pedit COW Kernel Local Privilege Escalation Vulnerability Mitigations
Ubuntu, Wednesday, July 1st, 2026
Ubuntu details interim mitigations for CVE-2026-46331, a tc-pedit kernel privilege escalation vulnerability.
Ubuntu published mitigation guidance for CVE-2026-46331, a Linux kernel vulnerability in the tc-pedit traffic control module that allows local users to gain root privileges and potentially escape containers.
Releases from Bionic through Questing Quokka require manual intervention, while Resolute Raccoon 26.04 LTS includes built-in AppArmor protections that limit exposure. The post provides step-by-step instructions for blocking the vulnerable kernel module.
These mitigations are intended to protect systems until official patches become available.