CVE-2025-68972

Publication date 27 December 2025

Last updated 31 March 2026

Ubuntu priority

Cvss 3 Severity Score

Description

In GnuPG through 2.4.8, if a signed message has \f at the end of a plaintext line, an adversary can construct a modified message that places additional text after the signed material, such that signature verification of the modified message succeeds (although an "invalid armor" message is printed during verification). This is related to use of \f as a marker to denote truncation of a long plaintext line.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
gnupg2	25.10 questing	Not affected
	25.04 plucky	Ignored end of life, was not-affected (see notes) [2026-01-29]
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected

Notes

mdeslaur

Per GnuPG developers, this is not a security issue, see: https://gnupg.org/blog/20251226-cleartext-signatures.html https://lists.gnupg.org/pipermail/gnupg-devel/2026-January/036164.html https://lists.gnupg.org/pipermail/gnupg-devel/2026-January/036154.html Marking as not-affected in Ubuntu.

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.9 · Medium

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Changed
Confidentiality impact	None
Integrity impact	High
Availability impact	None

Scores

Parameter	Value
Base score	5.9 · Medium
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N