GNU Gatekeeper (gnugk) before 5.16 contains an out-of-bounds read vulnerability in ParseRTCP() in ProxyChannel.cxx that allows remote RTP peers to read heap memory past received packets. Attackers can send RTCP SDES items lacking a NUL byte to the media proxy port during proxied H.323 calls with EnableRTCPStats enabled, crashing the gatekeeper.
History

Fri, 06 Nov 2026 22:00:00 +0000

Type Values Removed Values Added
First Time appeared Willamowius
Willamowius gnugk
Vendors & Products Willamowius
Willamowius gnugk

Tue, 03 Nov 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 03 Nov 2026 17:30:00 +0000

Type Values Removed Values Added
Description GNU Gatekeeper (gnugk) before 5.16 contains an out-of-bounds read vulnerability in ParseRTCP() in ProxyChannel.cxx that allows remote RTP peers to read heap memory past received packets. Attackers can send RTCP SDES items lacking a NUL byte to the media proxy port during proxied H.323 calls with EnableRTCPStats enabled, crashing the gatekeeper.
Title GNU Gatekeeper before 5.16 Out-of-Bounds Read via RTCP SDES Parsing
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-11-03T17:13:52.678Z

Updated: 2026-11-03T17:24:49.403Z

Reserved: 2026-11-03T16:57:44.037Z

Link: CVE-2026-121625

cve-icon Vulnrichment

Updated: 2026-11-03T17:24:13.074Z

cve-icon NVD

Status : Received

Published: 2026-11-03T18:17:58.440

Modified: 2026-11-03T18:17:58.440

Link: CVE-2026-121625

cve-icon Redhat

No data.