CVE-2022-49622

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

Description A use-after-free issue occurs in the Linux kernel when the verdict is NF STOLEN, potentially allowing access to freed memory. This happens when tracing is enabled and can involve accessing skb->nf trace, skb->mark, computing the trace id, or dumping the packet payload. To mitigate this, a cached copy of skb->nf trace is kept in the trace state struct and refreshed when the verdict is not STOLEN. Additionally, access to skb->mark is skipped when the verdict is STOLEN, the trace id is precomputed, and packet dumping is only done when the verdict is not STOLEN.

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