CVE-2025-68973
Publication date 28 December 2025
Last updated 7 January 2026
Ubuntu priority
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.)
Why is this CVE high priority?
OOB write
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| gnupg2 | 25.10 questing |
Needs evaluation
|
| 25.04 plucky |
Needs evaluation
|
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.8 · High
|
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Changed |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N |
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2025-68973
- https://gpg.fail/memcpy
- https://www.openwall.com/lists/oss-security/2025/12/28/5
- https://github.com/gpg/gnupg/commit/115d138ba599328005c5321c0ef9f00355838ca9 (gnupg-2.5.14)
- https://github.com/gpg/gnupg/commit/4ecc5122f20e10c17172ed72f4fa46c784b5fb48 (gnupg-2.4.9)
- https://github.com/gpg/gnupg/commit/1e929abd20fa2e4be3797a137caca63a971d5372 (gnupg-2.2.51)
- 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://news.ycombinator.com/item?id=46403200
- http://www.openwall.com/lists/oss-security/2025/12/29/11
- https://dev.gnupg.org/T7906
- https://dev.gnupg.org/T8001