Stack-based buffer overflow in freeswitch - CVE-2026-116572
Published: November 9, 2026
Vulnerability identifier: #VU162780
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-116572
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a low-privileged remote attacker to crash FreeSWITCH and terminate every active call.
The vulnerability exists due to an unbounded copy of a stored SIP Contact display-name into a fixed stack buffer in mod_sofia on profiles with manage-presence or manage-shared-appearance enabled. A low-privileged remote attacker can establish an inbound dialog with an oversized display-name and subscribe to its dialog events to trigger the overflow, using profile credentials unless subscription authentication is disabled.
Affected software
freeswitch
How to mitigate CVE-2026-116572
Install security update from vendor's website.
freeswitch - update to 1.11.2