CVE-2025-68973
HIGH severity · CVSS 7.8 · CWE-675
7.8CVSS HIGH
Summary
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.)
Impact & exploitability
Attack vectorLocal
Attack complexityHigh
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/gpg/gnupg/commit/115d138ba599328005c5321c0ef9f00355838ca9 ↗
Additional information
- NVD record
- https://github.com/gpg/gnupg/commit/115d138ba599328005c5321c0ef9f00355838ca9Patch
- https://github.com/gpg/gnupg/compare/gnupg-2.2.50...gnupg-2.2.51Patch
- http://www.openwall.com/lists/oss-security/2025/12/29/11Patch
- https://github.com/gpg/gnupg/blob/ff30683418695f5d2cc9e6cf8c9418e09378ebe4/g10/armor.c#L1305-L1306
- https://gpg.fail/memcpy
- https://media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i
- https://news.ycombinator.com/item?id=46403200
- https://www.openwall.com/lists/oss-security/2025/12/28/5