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Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 26.04 LTS : ImageMagick vulnerabilities (USN-8739-1)

critical Nessus Plugin ID 344613

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Synopsis

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

Description

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8739-1 advisory.

 It was discovered that ImageMagick incorrectly handled certain images. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2026-56366, CVE-2026-56368, CVE-2026-56371, CVE-2026-56373)

 It was discovered that ImageMagick incorrectly handled certain images. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 22.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-56370)

 It was discovered that ImageMagick incorrectly handled certain images. An attacker could possibly use this issue to cause a denial of service or expose sensitive information. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2026-56378)

 It was discovered that ImageMagick incorrectly handled certain images. An attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2026-56379)

 It was discovered that ImageMagick incorrectly handled memory allocation in certain operations. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-61465)

 It was discovered that ImageMagick incorrectly handled certain images. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS and Ubuntu 26.04 LTS.
 (CVE-2026-61857)

 It was discovered that ImageMagick incorrectly handled certain images. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-61863, CVE-2026-61864, CVE-2026-61865, CVE-2026-61870)

 It was discovered that ImageMagick incorrectly handled certain images. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-61866)

 It was discovered that ImageMagick incorrectly handled certain images on 32-bit systems. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 26.04 LTS.
 (CVE-2026-62946)

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-8739-1

Plugin Details

Severity: Critical

ID: 344613

File Name: ubuntu_USN-8739-1.nasl

Version: 1.3

Type: Local

Agent: unix

Published: 9/10/2026

Updated: 9/11/2026

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: 4.9

Percentile: 58.14

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2026-56378

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 7.2

Threat Vector: CVSS:4.0/E:U

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

CVSS Score Source: CVE-2026-56379

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:imagemagick-6-common, p-cpe:/a:canonical:ubuntu_linux:imagemagick-6.q16, p-cpe:/a:canonical:ubuntu_linux:imagemagick-6.q16hdri, p-cpe:/a:canonical:ubuntu_linux:imagemagick-7-common, p-cpe:/a:canonical:ubuntu_linux:imagemagick-7.q16, p-cpe:/a:canonical:ubuntu_linux:imagemagick-7.q16hdri, p-cpe:/a:canonical:ubuntu_linux:imagemagick-common, p-cpe:/a:canonical:ubuntu_linux:imagemagick, p-cpe:/a:canonical:ubuntu_linux:libimage-magick-perl, p-cpe:/a:canonical:ubuntu_linux:libimage-magick-q16-perl, p-cpe:/a:canonical:ubuntu_linux:libimage-magick-q16hdri-perl, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6-headers, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6.q16-5v5, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6.q16-7, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6.q16-8, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6.q16hdri-7, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-6.q16hdri-8, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-7-headers, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-7.q16-5, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b-7.q16hdri-5, p-cpe:/a:canonical:ubuntu_linux:libmagick%2b%2b5, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6-arch-config, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6-headers, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-2-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-2, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-3-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-3, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-6-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16-6, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16hdri-3-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16hdri-3, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16hdri-6-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-6.q16hdri-6, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-7-arch-config, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-7-headers, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-7.q16-10-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-7.q16-10, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-7.q16hdri-10-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore-7.q16hdri-10, p-cpe:/a:canonical:ubuntu_linux:libmagickcore5-extra, p-cpe:/a:canonical:ubuntu_linux:libmagickcore5, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6-headers, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16-2, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16-3, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16-6, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16hdri-3, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-6.q16hdri-6, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-7-headers, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-7.q16-10, p-cpe:/a:canonical:ubuntu_linux:libmagickwand-7.q16hdri-10, p-cpe:/a:canonical:ubuntu_linux:libmagickwand5, p-cpe:/a:canonical:ubuntu_linux:perlmagick

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-2026-56366, CVE-2026-56368, CVE-2026-56370, CVE-2026-56371, CVE-2026-56373, CVE-2026-56378, CVE-2026-56379, CVE-2026-61465, CVE-2026-61857, CVE-2026-61863, CVE-2026-61864, CVE-2026-61865, CVE-2026-61866, CVE-2026-61870, CVE-2026-62946

IAVB: 2026-B-0253

USN: 8739-1