Buffer overflow in Gnupg
CVE-2025-68973
In GnuPG before 2.4.9, armor_filter in g10/armor.c has two increments of an index variable where one is intended, leading to an out-of-bounds write for crafted input. (For ExtendedLTS, 2.2.51 and later are fixed versions.)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (4.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Gnupg — versions 0, 2.3.0
Weakness classification (CWE)
References
- gpg.fail/memcpy (Broken Link)
- news.ycombinator.com/item (Issue Tracking)
- www.openwall.com/lists/oss-security/2025/12/28/5 (Mailing List)
- github.com/gpg/gnupg/commit/115d138ba599328005c5321c0ef9f00355838ca9 (Patch)
- github.com/gpg/gnupg/blob/ff30683418695f5d2cc9e6cf8c9418e09378ebe4/g10/armor.c (Product)
- github.com/gpg/gnupg/compare/gnupg-2.2.50...gnupg-2.2.51 (Patch)
- media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i (Issue Tracking)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Patch)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-68973?
- CVE-2025-68973 is a high-severity vulnerability in Gnupg, classified under CWE-675. CVSS score: 7.8/10. Published 2025-12-28.
- How severe is CVE-2025-68973?
- High severity. CVSS v3 base score is 7.8 out of 10.