CVE-2026-59691

EUVD-2026-42569
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.1 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 25.58%
Debian logo
Debian Releases
Debian Product
Codename
gst-plugins-bad1.0
bookworm
vulnerable
bookworm (security)
vulnerable
bullseye
vulnerable
bullseye (security)
vulnerable
forky
1.28.6-1
fixed
sid
1.28.6-1
fixed
trixie
no-dsa
trixie (security)
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
gst-plugins-bad1.0
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
trusty
needs-triage
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
gstreamer1-plugins-bad-free
RHEL 8
0:1.16.1-9.el8_10.1
fixed
RHEL 9
0:1.22.12-7.el9_8.3
fixed
gstreamer1-plugins-bad-free-devel
RHEL 8
0:1.16.1-9.el8_10.1
fixed
RHEL 9
0:1.22.12-7.el9_8.3
fixed
gstreamer1-plugins-bad-free-libs
RHEL 9
0:1.22.12-7.el9_8.3
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
gstreamer-plugins-bad-free
Amazon Linux 2
0:0.10.23-42.amzn2.0.5
fixed
gstreamer-plugins-bad-free-debuginfo
Amazon Linux 2
0:0.10.23-42.amzn2.0.5
fixed
gstreamer-plugins-bad-free-devel
Amazon Linux 2
0:0.10.23-42.amzn2.0.5
fixed
gstreamer-plugins-bad-free-devel-docs
Amazon Linux 2
0:0.10.23-42.amzn2.0.5
fixed
gstreamer1-plugin-openh264
Amazon Linux 2023
0:1.24.10-1.amzn2023.0.8
fixed
gstreamer1-plugin-openh264-debuginfo
Amazon Linux 2023
0:1.24.10-1.amzn2023.0.8
fixed
gstreamer1-plugins-bad-free
Amazon Linux 2
0:1.18.4-5.amzn2.0.7
fixed
Amazon Linux 2023
0:1.24.10-1.amzn2023.0.8
fixed
gstreamer1-plugins-bad-free-debuginfo
Amazon Linux 2
0:1.18.4-5.amzn2.0.7
fixed
Amazon Linux 2023
0:1.24.10-1.amzn2023.0.8
fixed
gstreamer1-plugins-bad-free-debugsource
Amazon Linux 2023
0:1.24.10-1.amzn2023.0.8
fixed
gstreamer1-plugins-bad-free-devel
Amazon Linux 2
0:1.18.4-5.amzn2.0.7
fixed
Amazon Linux 2023
0:1.24.10-1.amzn2023.0.8
fixed
gstreamer1-plugins-bad-free-libs
Amazon Linux 2023
0:1.24.10-1.amzn2023.0.8
fixed
gstreamer1-plugins-bad-free-libs-debuginfo
Amazon Linux 2023
0:1.24.10-1.amzn2023.0.8
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://access.redhat.com/errata/RHSA-2026:47179
https://access.redhat.com/errata/RHSA-2026:47180
https://access.redhat.com/errata/RHSA-2026:47731
https://access.redhat.com/errata/RHSA-2026:54658
https://access.redhat.com/errata/RHSA-2026:54659
https://access.redhat.com/errata/RHSA-2026:54660
https://access.redhat.com/errata/RHSA-2026:54664
https://access.redhat.com/errata/RHSA-2026:54665
https://access.redhat.com/errata/RHSA-2026:54752
https://access.redhat.com/errata/RHSA-2026:56658
https://access.redhat.com/errata/RHSA-2026:56772
https://access.redhat.com/security/cve/CVE-2026-59691
https://bugzilla.redhat.com/show_bug.cgi?id=2497343
https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/100
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5173