Out-of-bounds read in freeswitch - CVE-2026-49475
Published: June 4, 2026
Vulnerability identifier: #VU133321
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-49475
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: www.freeswitch.org
Affected software:
freeswitch
freeswitch
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read and out-of-bounds write in switch_stun_packet_parse() when parsing crafted STUN attributes on an ICE-enabled call leg. A remote attacker can send a specially crafted UDP datagram to cause a denial of service.
STUN parsing occurs before the STUN message integrity check, and no ICE password or prior interaction with the call is required.
How to mitigate CVE-2026-49475
Install security update from vendor's website.