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Vulnerabilities CVE-2026-52720

CVE-2026-52720

High
Open
TLP:CLEAR

Gstreamer1-plugins-bad-free: gstreamer: heap buffer overflow via crafted vnc server rectangle in librfb

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Description

A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a malicious VNC server and trick a user into connecting, resulting in an out-of-bounds heap write that could lead to code execution or a crash.

Details

CVSS Score
8.8
EPSS Score
0.64%

47.6th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Confidence
90%
Published
Jun 15, 2026
Last Modified
Aug 3, 2026
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