Use-after-free in pjsip - #VU155806
Published: October 15, 2026
Vulnerability identifier: #VU155806
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use-after-free in dataconn_on_data_read() in pjnath/src/pjnath/turn_sock.c when processing received data on a TURN TCP data connection. A remote attacker can trigger a ConnectionBind error response through a controlled TURN server or an on-path position on the data connection to cause a denial of service.
Only applications using TURN TCP allocations with TCP peer connections under RFC 6062, with peer_conn_type set to PJ_TURN_TP_TCP, are affected. PJSUA/PJSUA2 do not enable this functionality, and allocations with UDP peer connections are not affected.
Affected software
pjsip
Remediation
Install security update from vendor's website.
pjsip - update to 2.18