CVE-2026-52990 | Linux Kernel up to 6.12.90/6.18.32/7.0.9 fsnotify fsnotify_recalc_mask lock locking (WID-SEC-2026-2077)

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.12.90/6.18.32/7.0.9. This affects the function fsnotify_recalc_mask of the component fsnotify. Performing a manipulation of the argument lock results in improper locking. This vulnerability was named CVE-2026-52990. The attack needs to be approached within the local network. There is no available exploit. It is advisable to upgrade the affected component.