Infinite loop in Sofia-SIP - CVE-2026-116792
Published: November 9, 2026
Vulnerability identifier: #VU162589
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-2026-116792
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unauthenticated remote attacker to cause persistent denial of service by stalling subsequent SIP URI resolution in Sofia-SIP.
The vulnerability exists due to missing traversal limits in the bundled DNS resolver when an accepted response contains cyclic domain name compression pointers. An unauthenticated remote attacker can send a SIP request naming a domain whose authoritative nameserver they control and return a crafted DNS response, trapping the decoding thread until the process restarts.
Affected software
Sofia-SIP
How to mitigate CVE-2026-116792
Install security update from vendor's website.
Sofia-SIP - update to 1.13.18