Vulnerability Details 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.)
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 2.9%
CVSS Severity
CVSS v3 Score 7.8
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
- https://news.ycombinator.com/item?id=46403200
- https://www.openwall.com/lists/oss-security/2025/12/28/5
- http://www.openwall.com/lists/oss-security/2025/12/29/11
- https://gpg.fail/memcpy
Products affected by CVE-2025-68973
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cpe:2.3:a:gnupg:gnupg:2.3.0
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cpe:2.3:a:gnupg:gnupg:2.3.8
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cpe:2.3:a:gnupg:gnupg:2.4.0
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cpe:2.3:a:gnupg:gnupg:2.4.1
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cpe:2.3:a:gnupg:gnupg:2.4.2
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cpe:2.3:a:gnupg:gnupg:2.4.3
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cpe:2.3:a:gnupg:gnupg:2.4.4
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cpe:2.3:a:gnupg:gnupg:2.4.5
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cpe:2.3:a:gnupg:gnupg:2.4.6
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cpe:2.3:a:gnupg:gnupg:2.4.7
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cpe:2.3:a:gnupg:gnupg:2.4.8