---
id: CVE-2025-68972
title: >-
  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 mess…
summary: >-
  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 mess…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N'
cwe:
  - CWE-347
vendor: gnupg
product: gnupg
affected:
  - gnupg <= 2.4.8
published: '2025-12-27'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T09:10:00.323'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68972'
references:
  - url: 'https://gpg.fail/formfeed'
    label: cve@mitre.org
  - url: >-
      https://media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i
    label: cve@mitre.org
  - url: 'https://news.ycombinator.com/item?id=46404339'
    label: cve@mitre.org
  - url: 'https://gpg.fail/formfeed'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00113
epssPercentile: 0.01354
ingestedAt: '2026-10-13T09:20:23.162Z'
---

## Overview

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.

## Affected

- `gnupg <= 2.4.8`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.