CVE-2025-30258
Publication date 19 March 2025
Last updated 19 August 2025
Ubuntu priority
Description
In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid backsig or that has incorrect usage flags, the user loses the ability to verify signatures made from certain other signing keys, aka a "verification DoS."
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| gnupg2 | 25.10 questing |
Fixed 2.4.4-2ubuntu23
|
| 25.04 plucky |
Fixed 2.4.4-2ubuntu23
|
|
| 24.04 LTS noble |
Fixed 2.4.4-2ubuntu17.2
|
|
| 22.04 LTS jammy |
Fixed 2.2.27-3ubuntu2.3
|
|
| 20.04 LTS focal |
Fixed 2.2.19-3ubuntu2.4
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Patch details
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
2.7 · Low
|
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | None |
| User interaction | Required |
| Scope | Changed |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L |
References
Related Ubuntu Security Notices (USN)
- USN-7412-1
- GnuPG vulnerability
- 3 April 2025