Linux Distros Unpatched Vulnerability : CVE-2026-59691

high Nessus Plugin ID 325937

Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- 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. (CVE-2026-59691)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: High

ID: 325937

File Name: unpatched_CVE_2026_59691.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 7/9/2026

Updated: 7/10/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 52.01

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.9

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P

CVSS Score Source: CVE-2026-59691

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:gstreamer1-plugins-bad-free-devel, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:redhat:enterprise_linux:gstreamer-plugins-bad-free, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:gstreamer-plugins-bad-free-devel-docs, p-cpe:/a:debian:debian_linux:gst-plugins-bad1.0, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:redhat:enterprise_linux:gstreamer-plugins-bad-free-devel-docs, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:gstreamer-plugins-bad-free-extras, p-cpe:/a:redhat:enterprise_linux:gstreamer-plugins-bad-free-devel, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:gstreamer1-plugins-bad-free-libs, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:centos:centos:gstreamer1-plugins-bad-free-gtk, p-cpe:/a:canonical:ubuntu_linux:gst-plugins-bad1.0, p-cpe:/a:redhat:enterprise_linux:gstreamer-plugins-bad-free-extras, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:redhat:enterprise_linux:7, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:gstreamer1-plugins-bad-free-devel, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:gstreamer-plugins-bad-free, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:centos:centos:gstreamer1-plugins-bad-free, p-cpe:/a:redhat:enterprise_linux:gstreamer1-plugins-bad-free, p-cpe:/a:centos:centos:gstreamer-plugins-bad-free-devel, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:centos:centos:gstreamer1-plugins-bad-free-libs, p-cpe:/a:redhat:enterprise_linux:gstreamer1-plugins-bad-free-gtk, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:redhat:enterprise_linux:6, cpe:/o:debian:debian_linux:12.0

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 7/9/2026

Reference Information

CVE: CVE-2026-59691

Detections

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