CVE-2026-53033

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

Description A race condition exists in the unix stream bpf update proto() function within the Linux kernel's sockmap functionality. This issue occurs when a BPF (Berkeley Packet Filter) iterator program updates a sockmap, potentially causing the peer pointer to become stale during a state transition from TCP ESTABLISHED to TCP CLOSE. This leads to a use-after-free (UaF) condition, where memory is accessed after it has been freed. An attacker could exploit this to cause a denial of service or achieve arbitrary code execution.

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