CVE Database›Document archive›CVE-2025-68972

CVE-2025-68972

gnupg: GnuPG: Signature bypass via form feed character in signed messages

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Severity

Moderate

Red Hat Product Security

5.9

CVSS 3.1

Review impact separately from score.

Published · December 28, 2025

Updated · July 8, 2026

Description

A flaw was found in GnuPG. An adversary can exploit this vulnerability by crafting a signed message that includes a form feed character (\f) at the end of a plaintext line. This allows the adversary to append additional, unsigned text to the message while the signature verification still reports success. This issue leads to an integrity bypass, potentially enabling the spoofing of signed communications.

Statement

This vulnerability is rated Moderate for Red Hat products as it affects GnuPG, allowing an attacker to append unsigned text to a signed message while signature verification still reports success. This integrity bypass could lead to spoofing of signed communications, impacting the authenticity of signed data in Red Hat Enterprise Linux environments.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

CVSS / CWE

CVSS 3.1 · 5.9
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N

CWE-347 · Improper Verification of Cryptographic Signature