CVE-2026-23270

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

Description The Linux kernel contains an issue related to network packet scheduling. Specifically, the act ct action was found to potentially cause a Use-After-Free (UAF) condition when interacting with the defragmentation engine if a packet returns TC ACT CONSUMED while held by the engine. This can occur when act ct is used in the egress path. To address this, the kernel now restricts act ct to only bind to clsact/ingress qdiscs and shared blocks. This allows act ct to still function in egress scenarios, but only with clsact. The skb variable is involved in this issue.

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