CVE-2026-89661 | Linux Kernel up to 7.2.3 NFSD unlock_filesystem nfsd4_cancel_copy_by_sb use after free

September 12, 2026 Yanac

A vulnerability was found in Linux Kernel up to 7.2.3. It has been rated as critical. This issue affects the function nfsd4_cancel_copy_by_sb of the file /proc/fs/nfsd/unlock_filesystem of the component NFSD. Performing a manipulation results in use after free.

This vulnerability is identified as CVE-2026-89661. The attack is only possible with local access. There is not any exploit available.

Upgrading the affected component is advised.VulDB Recent EntriesRead More