Amazon Linux 2023 : gstreamer1-plugins-base, gstreamer1-plugins-base-devel, gstreamer1-plugins-base-tools (ALAS2023-2026-3397)

high Nessus Plugin ID 377964

Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-3397 advisory.

A flaw was found in gst-plugins-base. A heap buffer overflow can be triggered when processing video buffers whose attached GstVideoMeta metadata declares plane strides and offsets that exceed the actual backing memory allocation. The metadata is not range-checked during deserialization, and the video frame mapping code does not verify that the declared plane geometry fits within the buffer before allowing consumers to read or write video data. A local attacker who controls the sending side of a GStreamer inter-process IPC pipeline can deliver a crafted buffer carrying fabricated strides, causing the receiving process to read or write beyond heap boundaries. Successful exploitation can cause a denial of service or potentially allow code execution within the affected process. (CVE-2026-86476)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Run 'dnf update gstreamer1-plugins-base --releasever 2023.12.20261109' or or 'dnf update --advisory ALAS2023-2026-3397 --releasever 2023.12.20261109' to update your system.

Plugin Details

Severity: High

ID: 377964

File Name: al2023_ALAS2023-2026-3397.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 11/9/2026

Updated: 11/9/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.52

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-86476

CVSS v3

Risk Factor: High

Base Score: 8.4

Temporal Score: 7.6

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:gstreamer1-plugins-base-debuginfo, p-cpe:/a:amazon:linux:gstreamer1-plugins-base-debugsource, p-cpe:/a:amazon:linux:gstreamer1-plugins-base-devel, p-cpe:/a:amazon:linux:gstreamer1-plugins-base-tools-debuginfo, p-cpe:/a:amazon:linux:gstreamer1-plugins-base-tools, p-cpe:/a:amazon:linux:gstreamer1-plugins-base

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/9/2026

Vulnerability Publication Date: 10/12/2026

Reference Information

CVE: CVE-2026-86476

Detections

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