PT-2026-56783 · Red Hat · Red Hat Enterprise Linux 10+4

Published 2026-07-09 · Updated 2026-07-09 · CVE-2026-59691

NVD

CVSS v3.1

7.1

High

Base vector

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

A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and potential memory corruption.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-59691

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 · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-59691 · Security Note
• https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5173 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2497343 · Note
• https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/100 · Note
• https://access.redhat.com/security/cve/CVE-2026-59691 · Note