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Ubuntu 26.04 LTS : FFmpeg vulnerabilities (USN-8738-1)

high Nessus Plugin ID 344612

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8738-1 advisory.

 It was discovered that FFmpeg incorrectly handled certain video frames when using the hqdn3d filter. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code.
 (CVE-2026-66036)

 Adrian Junge discovered that FFmpeg incorrectly handled certain compressed video files. An attacker could possibly use this issue to expose sensitive information. (CVE-2026-66038)

 Adrian Junge discovered that FFmpeg incorrectly handled certain audio files. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-66039)

 Adrian Junge discovered that FFmpeg incorrectly handled certain subtitle files. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-70628)

 Adrian Junge discovered that FFmpeg incorrectly handled certain video files. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-70632)

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

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

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8738-1

Plugin Details

Severity: High

ID: 344612

File Name: ubuntu_USN-8738-1.nasl

Version: 1.2

Type: Local

Agent: unix

Published: 9/10/2026

Updated: 9/10/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.51

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-66036

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-66039

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:ffmpeg, p-cpe:/a:canonical:ubuntu_linux:libavcodec-extra62, p-cpe:/a:canonical:ubuntu_linux:libavcodec-extra, p-cpe:/a:canonical:ubuntu_linux:libavcodec62, p-cpe:/a:canonical:ubuntu_linux:libavdevice62, p-cpe:/a:canonical:ubuntu_linux:libavfilter-extra11, p-cpe:/a:canonical:ubuntu_linux:libavfilter-extra, p-cpe:/a:canonical:ubuntu_linux:libavfilter11, p-cpe:/a:canonical:ubuntu_linux:libavformat-extra62, p-cpe:/a:canonical:ubuntu_linux:libavformat-extra, p-cpe:/a:canonical:ubuntu_linux:libavformat62, p-cpe:/a:canonical:ubuntu_linux:libavutil60, p-cpe:/a:canonical:ubuntu_linux:libswresample6, p-cpe:/a:canonical:ubuntu_linux:libswscale9

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 9/8/2026

Vulnerability Publication Date: 9/8/2026

Reference Information

CVE: CVE-2026-66036, CVE-2026-66038, CVE-2026-66039, CVE-2026-70628, CVE-2026-70632

USN: 8738-1