Vulnerability · Published Apr 23, 2026 · Assigned by mitre
CVE-2026-41990
Medium 4.0
In plain English
A medium-severity out-of-bounds write in Libgcrypt from gnupg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.0Medium
Exploit odds (30 days)0.2%top 86.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | libgcrypt20 | 1.12.2-1 | DEBIAN-CVE-2026-41990 |
| Ubuntu:22.04:LTS | libgcrypt20 | 1.9.4-3ubuntu3.2 | USN-8319-1 |
| Ubuntu:24.04:LTS | libgcrypt20 | 1.10.3-2ubuntu0.1 | USN-8319-1 |
| Ubuntu:25.10 | libgcrypt20 | 1.11.0-7ubuntu0.1 | USN-8319-1 |
| Ubuntu:26.04:LTS | libgcrypt20 | 1.12.0-2ubuntu0.1 | USN-8319-1 |
| Ubuntu:26.04:LTS | libgcrypt20 | 1.12.0-2ubuntu0.1 | UBUNTU-CVE-2026-41990 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L