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Vulnerability record · CVE-2025-68973 · published 28 December 2025

CVE-2025-68973: Gnupg out-of-bounds write vulnerability

Gnupg · Gnupg

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.)

7.0 CVSS 3.1 High EPSS 0.15% · top 96.3% CWE-675 · CWE-675CWE-787 · Out-of-bounds write
7.0CVSS 3.1 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/gpg/gnupg/blob/ff30683418695f5d2cc9e6cf8c9418e09378ebe4/g10/armor.c#L1305-L1306 Product
https://github.com/gpg/gnupg/commit/115d138ba599328005c5321c0ef9f00355838ca9 Patch
https://github.com/gpg/gnupg/compare/gnupg-2.2.50...gnupg-2.2.51 Patch
https://gpg.fail/memcpy Broken Link
https://media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical-vulnerabilities-i Issue Tracking
https://news.ycombinator.com/item?id=46403200 Issue Tracking
https://www.openwall.com/lists/oss-security/2025/12/28/5 Mailing List
http://www.openwall.com/lists/oss-security/2025/12/29/11 Mailing ListPatch
https://lists.debian.org/debian-lts-announce/2026/01/msg00008.html
https://gpg.fail/memcpy Broken Link

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Source: NIST National Vulnerability Database (record CVE-2025-68973), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.