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Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS : GnuPG vulnerability (USN-8720-1)

low Nessus Plugin ID 344616

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8720-1 advisory.

 It was discovered that GnuPG incorrectly validated authentication tag lengths when parsing CMS messages encrypted with AES-GCM. An attacker could possibly use this issue to bypass message integrity checks.

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8720-1

Plugin Details

Severity: Low

ID: 344616

File Name: ubuntu_USN-8720-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/10/2026

Updated: 9/10/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 1.2

Temporal Score: 0.9

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

CVSS Score Source: CVE-2026-57062

CVSS v3

Risk Factor: Low

Base Score: 2.9

Temporal Score: 2.6

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:canonical:ubuntu_linux:pro:-:lts, p-cpe:/a:canonical:ubuntu_linux:dirmngr, p-cpe:/a:canonical:ubuntu_linux:gnupg-agent, p-cpe:/a:canonical:ubuntu_linux:gnupg-l10n, p-cpe:/a:canonical:ubuntu_linux:gnupg-utils, p-cpe:/a:canonical:ubuntu_linux:gnupg2, p-cpe:/a:canonical:ubuntu_linux:gnupg, p-cpe:/a:canonical:ubuntu_linux:gpg-agent, p-cpe:/a:canonical:ubuntu_linux:gpg-wks-client, p-cpe:/a:canonical:ubuntu_linux:gpg-wks-server, p-cpe:/a:canonical:ubuntu_linux:gpg, p-cpe:/a:canonical:ubuntu_linux:gpgconf, p-cpe:/a:canonical:ubuntu_linux:gpgsm, p-cpe:/a:canonical:ubuntu_linux:gpgv-static, p-cpe:/a:canonical:ubuntu_linux:gpgv-win32, p-cpe:/a:canonical:ubuntu_linux:gpgv, p-cpe:/a:canonical:ubuntu_linux:keyboxd, p-cpe:/a:canonical:ubuntu_linux:scdaemon, p-cpe:/a:canonical:ubuntu_linux:tpm2daemon

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/3/2026

Vulnerability Publication Date: 6/23/2026

Reference Information

CVE: CVE-2026-57062

USN: 8720-1