Numeric truncation error in GnuPG - CVE-2025-68972
Published: December 29, 2025
Vulnerability identifier: #VU120610
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N/E:U/U:Green
CVE-ID: CVE-2025-68972
CWE-ID: CWE-197
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
GnuPG
GnuPG
Detailed vulnerability description
The vulnerability allows a remote attacker to spoof contents of signed messages.
The vulnerability exists due to software truncates plaintext lines to 20000 characters minus padding when verifying signed data. A remote attacker can inject arbitrary payload into signed messages that still could be verified, allowing message spoofing.
How to mitigate CVE-2025-68972
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.