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.)

CVSS 3.1

7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-25)

CWEs

CWE-787, CWE-675

Published

2025-12-28

Modified

2026-10-13

Record from

the NVD, synced 2026-10-19

Affected

• gnupg:gnupg

References

• https://github.com/gpg/gnupg/blob/ff30683418695f5d2cc9e6cf8c9418e09378ebe4/g10/armor.c#L1305-L1306
• https://github.com/gpg/gnupg/commit/115d138ba599328005c5321c0ef9f00355838ca9
• https://github.com/gpg/gnupg/compare/gnupg-2.2.50...gnupg-2.2.51
• https://gpg.fail/memcpy
• https://media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i

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