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Vulnerability · Published Jul 9, 2026 · Assigned by redhat

CVE-2026-59691Gstreamer1-plugins-bad-free: gstreamer: rfbsrc/librfb hextile heap out-of-bounds write with 16bpp framebuffer

High 7.1

In plain English

A high-severity out-of-bounds write in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.3%top 74.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10gstreamer1-plugins-bad-free1.26.7-2.el10_2.6ALSA-2026:47180
AlmaLinux:8gstreamer1-plugins-bad-free1.16.1-9.el8_10.1ALSA-2026:47731
AlmaLinux:9gstreamer1-plugins-bad-free1.22.12-7.el9_8.3ALSA-2026:47179
AlmaLinux:10gstreamer1-plugins-bad-free-devel1.26.7-2.el10_2.6ALSA-2026:47180
AlmaLinux:8gstreamer1-plugins-bad-free-devel1.16.1-9.el8_10.1ALSA-2026:47731
AlmaLinux:9gstreamer1-plugins-bad-free-devel1.22.12-7.el9_8.3ALSA-2026:47179
AlmaLinux:10gstreamer1-plugins-bad-free-libs1.26.7-2.el10_2.6ALSA-2026:47180
AlmaLinux:9gstreamer1-plugins-bad-free-libs1.22.12-7.el9_8.3ALSA-2026:47179
Debian:12gst-plugins-bad1.01.22.0-4+deb12u8DEBIAN-CVE-2026-59691
Debian:13gst-plugins-bad1.0no fix listedDEBIAN-CVE-2026-59691
Debian:14gst-plugins-bad1.01.28.5-1DEBIAN-CVE-2026-59691
Rocky Linux:10gstreamer1-plugins-bad-free0:1.26.7-2.el10_2.6RLSA-2026:47180
Rocky Linux:8gstreamer1-plugins-bad-free0:1.16.1-9.el8_10.1RLSA-2026:47731
Rocky Linux:9gstreamer1-plugins-bad-free0:1.22.12-7.el9_8.3RLSA-2026:47179
Ubuntu:25.10gst-plugins-bad1.0no fix listedUBUNTU-CVE-2026-59691
Ubuntu:26.04:LTSgst-plugins-bad1.0no fix listedUBUNTU-CVE-2026-59691
Ubuntu:26.10gst-plugins-bad1.0no fix listedUBUNTU-CVE-2026-59691

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 6 see references

Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

References