Heap-based buffer overflow in pjsip - CVE-2026-32945
Published: April 14, 2026
Vulnerability identifier: #VU125900
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: CVE-2026-32945
CWE-ID: CWE-122
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 heap-based buffer overflow in the DNS parser's name length handler when parsing DNS records. A remote attacker can send a specially crafted DNS response to cause a denial of service.
Only applications using the PJSIP DNS resolver are affected, such as PJSUA or PJSUA2 when configured with a nameserver.
Affected software
pjsip
How to mitigate CVE-2026-32945
Install security update from vendor's website.
pjsip - update to 2.17