CVE-2026-74583

A flaw was found in the Linux kernel's net/sched: clsroute component. A race condition exists in the route4 classifier's fastmap cache, where a reader can re-cache a pointer to a filter that has already been freed by a writer. This can lead to a use-after-free condition, allowing subsequent packe...

CVE-2026-74583

CVE-2026-74583 is a use-after-free race condition in the Linux kernel's net/sched: cls_route (route4 classifier). The classifier maintains a 16-slot fastmap cache storing raw struct route4_filter pointers indexed by (id, iif). A race exists between the reader (route4_classify) and the writer (rou...

EUVD-2026-64005

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsroute: fix fastmap use-after-free on filter The route4 classifier maintains a 16-slot fastmap cache that stores raw struct route4filter pointers indexed by id, iif. The reader route4classify populates this cache via...

PT-2026-79404

In the Linux kernel, the following vulnerability has been resolved: net/sched: cls route: fix fastmap use-after-free on filter The route4 classifier maintains a 16-slot fastmap cache that stores raw struct route4 filter pointers indexed by id, iif. The reader route4 classify populates this cache...