CVE-2026-52720

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.
References
Link Resource
https://access.redhat.com/errata/RHSA-2026:36749
https://access.redhat.com/errata/RHSA-2026:36834
https://access.redhat.com/errata/RHSA-2026:37130
https://access.redhat.com/errata/RHSA-2026:47069
https://access.redhat.com/errata/RHSA-2026:47070
https://access.redhat.com/errata/RHSA-2026:47071
https://access.redhat.com/errata/RHSA-2026:47075
https://access.redhat.com/errata/RHSA-2026:47076
https://access.redhat.com/errata/RHSA-2026:47176
https://access.redhat.com/errata/RHSA-2026:47717
https://access.redhat.com/errata/RHSA-2026:47718
https://access.redhat.com/errata/RHSA-2026:49517
https://access.redhat.com/security/cve/CVE-2026-52720
https://bugzilla.redhat.com/show_bug.cgi?id=2486731
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5105
https://access.redhat.com/errata/RHSA-2026:36749
https://access.redhat.com/errata/RHSA-2026:36834
https://access.redhat.com/errata/RHSA-2026:37130
https://access.redhat.com/errata/RHSA-2026:47069
https://access.redhat.com/errata/RHSA-2026:47070
https://access.redhat.com/errata/RHSA-2026:47071
https://access.redhat.com/errata/RHSA-2026:47075
https://access.redhat.com/errata/RHSA-2026:47076
https://access.redhat.com/errata/RHSA-2026:47176
https://access.redhat.com/errata/RHSA-2026:47717
https://access.redhat.com/errata/RHSA-2026:47718
https://access.redhat.com/errata/RHSA-2026:49517
https://access.redhat.com/security/cve/CVE-2026-52720
https://bugzilla.redhat.com/show_bug.cgi?id=2486731
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52720.json
Configurations

No configuration.

History

No history.

Information

Published : 2026-06-15 20:16

Updated : 2026-08-03 13:18


NVD link : CVE-2026-52720

Mitre link : CVE-2026-52720

CVE.ORG link : CVE-2026-52720


JSON object : View

Products Affected

No product.

CWE
CWE-122

Heap-based Buffer Overflow