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Fencer Intel
medium 4.0

CVE-2026-41990 json

Libgcrypt before 1.12.2 mishandles Dilithium signing

published 6mo ago modified 14d ago also EUVD-2026-25193 , GHSA-78pv-qq8x-94px , JLSEC-2026-497

cvss
4.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

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

Patch / fix

  • julia Libgcrypt_jll 1.12.2+0
  • gnupg Libgcrypt 1.12.2
  • libgcrypt20 Debian 14 1.12.2-1

debian advisories DEBIAN-CVE-2026-41990

  • libgcrypt20 Ubuntu 26.04 LTS 1.12.0-2ubuntu0.1
  • libgcrypt20 Ubuntu Pro FIPS-updates 24.04 LTS 1.12.0-2ubuntu0.1~Fips1~rc11

ubuntu advisories UBUNTU-CVE-2026-41990

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libgcrypt hummingbird 1 1.12.2-1.hum1

red hat advisories RHSA-2026:8466

  • libgcrypt SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 1.12.1-160000.2.1

suse advisories SUSE-SU-2026:22270-1SUSE-SU-2026:22355-1

  • libgcrypt openSUSE Leap 16.0 1.12.1-160000.2.1

opensuse advisories openSUSE-SU-2026:21047-1

Is CVE-2026-41990 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-41990 updated cvss 3.3

Libgcrypt: Libgcrypt: Denial of Service or data integrity issues from missing bounds check during Dilithium signing.

  • Red Hat Enterprise Linux 6 libgcrypt Red Hat Enterprise Linux 7 libgcrypt Red Hat Enterprise Linux 8 libgcrypt, thunderbird Red Hat Enterprise Linux 9 libgcrypt, thunderbird Red Hat Enterprise Linux 10 libgcrypt, thunderbird Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-mlflow-rhel9, +6 more
    under investigation
  • Red Hat Hardened Images libgcrypt 1.12.2-1.hum1
    fixed: vendor fix RHSA-2026:8466
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-kube-rbac-proxy-rhel9, rhoai/odh-maas-controller-rhel9, rhoai/odh-mlflow-operator-rhel9, rhoai/odh-model-controller-rhel9, rhoai/odh-ogx-k8s-operator-rhel9, +14 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 4.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
OSV 3.1 4.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

Affected packages

ecosystem package affected fixed in
julia Libgcrypt_jll
>=1.12.0+0, <1.12.2+0
1.12.2+0

Affected products

  • gnupg Libgcrypt

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.