CVE-2026-72110

A flaw was found in the Linux kernel's BPF/fork component. A local user, by initiating a fork() operation from a process within a task storage map, can trigger a condition where the bpf_storage is not properly initialized. This can lead to a Use-After-Free (UAF) vulnerability, which occurs when the system attempts to use memory after it has been freed. Exploitation of this flaw could result in kernel hangs or other system instability, effectively causing a denial of service.

This vulnerability is rated as Moderate severity because exploitation is restricted to local access and relies on specific preconditions, limiting the primary impact to a denial of service. In standard Red Hat Enterprise Linux environments, unprivileged users cannot directly allocate BPF task storage maps, meaning exposure typically depends on administrative BPF utilities or tracing agents enrolling processes prior to an induced fork failure. When triggered, the flaw leads to system instability or kernel termination rather than arbitrary code execution or privilege escalation.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.