CVE-2026-41990: gnupg libgcrypt Out-of-bounds Write
CVSS: 4.0v3.1MediumAnalyzed
AliasesSUSE-SU-2026:22270-1SUSE-SU-2026:22355-1UBUNTU-CVE-2026-41990DEBIAN-CVE-2026-41990openSUSE-SU-2026:21047-1
Published 23-04-2026Last modified 23-04-2026
Vulnerability summary
CVE-2026-41990 is a medium (CVSS 4.0) Out-of-bounds Write vulnerability in gnupg libgcrypt. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.1% of scored vulnerabilities.
CVSS score
4.0/10
010
Medium · v3.1 (CVE.org)EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 2 · Related 1Timeline
- 23-04-2026PublishedVulnerability first disclosed.
- 23-04-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 4.0Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:LSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated4.0MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
- OSV · DebianEcosystem advisory · calculated4.0MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
- NVDNIST4.0MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
EPSS trend
Probability
0.18%
Chance of exploitation in the next 30 days
Percentile
7%
Versus all other CVEs
30-day change
0.00 pp
From 0.18% on 19-09-2026
19-09-202619-10-2026
EPSS score0.18%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Suse3 products
- libgcrypt&distro=SUSE Linux Enterprise Server 16.0< 1.12.1-160000.2.1
- libgcrypt&distro=SUSE Linux Enterprise Server for SAP applications 16.0< 1.12.1-160000.2.1
- libgcrypt&distro=SUSE Linux Micro 6.2< 1.12.1-160000.2.1
Debian1 product
- libgcrypt20< 1.12.2-1
Gnupg1 product
- libgcrypt≥ 1.12.0, < 1.12.2
Opensuse1 product
- libgcrypt&distro=openSUSE Leap 16.0< 1.12.1-160000.2.1
Ubuntu1 product
- libgcrypt20< 1.12.0-2ubuntu0.1~Fips1~rc11 | < 1.12.0-2ubuntu0.1
5 vendors · 7 products
References
11 links- dev.gnupg.org/T8208Broken Link
