PT-2026-49336 · Red Hat · Red Hat Enterprise Linux 10+4

Published 2026-06-15 · Updated 2026-06-15 · CVE-2026-52720

NVD

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-52720

Affected Products

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 6

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-52720 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2486731 · Note
• https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5105 · Note
• https://access.redhat.com/security/cve/CVE-2026-52720 · Note