Buffer overflow in Gnupg Libgcrypt

CVE-2026-41990

Libgcrypt before 1.12.2 mishandles Dilithium signing. Writes to a static array lack a bounds check but do not use attacker-controlled data.

Vulnerability class: Buffer Overflow

EPSS: 0.000 (0.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L.

Affected products

Gnupg Libgcrypt — versions 1.12.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

Frequently asked questions

What is CVE-2026-41990?: CVE-2026-41990 is a medium-severity vulnerability in Gnupg Libgcrypt, classified under Out-of-bounds Write. CVSS score: 4.0/10. Published 2026-04-23.
How severe is CVE-2026-41990?: Medium severity. CVSS v3 base score is 4.0 out of 10.