Vulnerability in Gnupg
CVE-2025-68972
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.001 (1.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: -0.000
Affected products
- Gnupg — versions 0
Weakness classification (CWE)
References
- gpg.fail/formfeed (Product)
- news.ycombinator.com/item (Issue Tracking)
- media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i (Product)
Frequently asked questions
- What is CVE-2025-68972?
- CVE-2025-68972 is a medium-severity vulnerability in Gnupg, classified under Improper Verification of Cryptographic Signature. CVSS score: 5.9/10. Published 2025-12-27.
- How severe is CVE-2025-68972?
- Medium severity. CVSS v3 base score is 5.9 out of 10.