Reachable assertion in pjsip - #VU165887
Published: November 11, 2026
Vulnerability identifier: #VU165887
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by crashing PJSUA2 applications built with assertions enabled.
The vulnerability exists due to a reachable assertion caused by a missing recheck of the cloned INVITE pointer in PJSUA2 Endpoint::on_incoming_call() when Account::onIncomingCall() immediately disconnects the call. A remote attacker can send INVITE requests that the application rejects within the callback after a provisional response to trigger a NULL-pointer assertion and abort the process.
Affected software
pjsip
Remediation
Install security update from vendor's website.
pjsip - update to 2.18