CVE-2026-74664

A flaw was found in the Linux kernel's Open vSwitch component. When processing flow updates, the ovsflowcmdnew function preallocates a reply buffer based on the request's flow identifier. If a shorter User Flow ID UFID is provided, but the system matches an existing flow with a longer key...

CVE-2026-74664

This vulnerability affects the Linux kernel's Open vSwitch (OVS) netlink flow command handling. The root cause is in ovs_flow_cmd_new(), which preallocates the reply skb sized from the request flow identifier. When a flow update request uses a UFID that misses the UFID lookup and falls back to th...