High severity · published Dec 28, 2025
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
7.0
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GN
GnuPG · GnuPG
before 2.2.51; 2.3.0 before 2.4.9 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-68973
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-68973
Product
https://github.com/gpg/gnupg/blob/ff30683418695f5d2cc9e6cf8c9418e09378ebe4/g10/armor.c#L1305-L1306
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
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