CVEvulnerability

CVE-2026-63380

5.7 MEDIUM Published 2026-08-20 Modified 2026-10-26 Official page ↗
Status
Awaiting Analysis
Published
2026-08-20
Last modified
2026-10-26
Assigner
[email protected]
CVSS 4.0 ([email protected])
5.7 MEDIUM — CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weaknesses
CWE-416, CWE-476

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.

Related

Weakness · CWE (2)

  • CWE-416 Use After Free weakness
  • CWE-476 NULL Pointer Dereference weakness

References