VULNERABILITY INTELLIGENCE
CVE-2026-63380
EPSS probability0.14%
CISA KEVNot currently listed
Published2026-08-20
Last modified2026-10-26
Description
Libevent is an event notification library. Prior to 2.2.2-alpha, libevent can dereference invalid list pointers in ws.c when evws_new_session enters its error path after evhttp_start_ws_ succeeds but bufferevent_enable_locking_ fails. evws_connection_free sees a non-null http_server and unconditionally calls TAILQ_REMOVE even though the session was never inserted into http_server->ws_sessions. A local caller able to induce this allocation or locking failure can crash the process. This issue is fixed in version 2.2.2-alpha.
Weakness classification
- security-advisories@github.com: CWE-416