CVE-2026-41990
Publication date 23 April 2026
Last updated 13 May 2026
Ubuntu priority
Description
Libgcrypt before 1.12.2 mishandles Dilithium signing. Writes to a static array lack a bounds check but do not use attacker-controlled data.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libgcrypt20 | 26.04 LTS resolute |
Vulnerable
|
| 25.10 questing |
Not affected
|
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Not affected
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
Notes
mdeslaur
introduced in 1.12.0 with: https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git;a=commit;h=1b422366e2b3b5438713418b50f8a0a1abf8d365
Patch details
| Package | Patch details |
|---|---|
| libgcrypt20 |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
4.0 · Medium
|
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | Low |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L |