CVE-2025-68973

low-risk

Published 2025-12-28

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.)

Do I need to act?

0.02% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.8/10 High

LOCAL / HIGH complexity

Affected Products (1)

Gnupg

Affected Vendors

Gnupg

References (10)

Product https://github.com/gpg/gnupg/blob/ff30683418695f5d2cc9e6cf8c9418e09378ebe4/g10/a...

Patch https://github.com/gpg/gnupg/commit/115d138ba599328005c5321c0ef9f00355838ca9

Patch https://github.com/gpg/gnupg/compare/gnupg-2.2.50...gnupg-2.2.51

Broken Link https://gpg.fail/memcpy

Issue Tracking https://media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i

Issue Tracking https://news.ycombinator.com/item?id=46403200

Mailing List https://www.openwall.com/lists/oss-security/2025/12/28/5

Mailing List http://www.openwall.com/lists/oss-security/2025/12/29/11

https://lists.debian.org/debian-lts-announce/2026/01/msg00008.html

Broken Link https://gpg.fail/memcpy

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low-risk

Severity 20/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal