CVE-2025-68972
gnupg: GnuPG: Signature bypass via form feed character in signed messages
Severity
ModerateRed Hat Product Security
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 · 5.9CVSS: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