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Fencer Vulns
medium 6.7

CVE-2026-41989 json

Libgcrypt before 1.12.2 sometimes allows a heap-based buffer overflow and denial of service via...

published 2026-04-23 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-25192 , GHSA-wrv8-79m2-qg24 , JLSEC-2026-496

cvss
6.7
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 7%
public exploits
0
none known

Summary

Libgcrypt before 1.12.2 sometimes allows a heap-based buffer overflow and denial of service via crafted ECDH ciphertext to gcry_pk_decrypt.

Patch / fix

  • julia Libgcrypt_jll 1.12.2+0
  • gnupg Libgcrypt 1.10.4, 1.11.3, 1.12.2
  • libgcrypt20 Debian 12 1.10.1-3+deb12u1
  • libgcrypt20 Debian 13 1.11.0-7+deb13u1
  • libgcrypt20 Debian 14 1.12.2-1

debian advisories DEBIAN-CVE-2026-41989

  • libgcrypt20 Ubuntu 22.04 LTS 1.9.4-3ubuntu3.2
  • libgcrypt20 Ubuntu 24.04 LTS 1.10.3-2ubuntu0.1
  • libgcrypt20 Ubuntu 25.10 1.11.0-7ubuntu0.1
  • libgcrypt20 Ubuntu 26.04 LTS 1.12.0-2ubuntu0.1
  • libgcrypt20 Ubuntu Pro FIPS-updates 22.04 LTS 1.9.4-3ubuntu3.2+Fips1
  • libgcrypt20 Ubuntu Pro FIPS-updates 24.04 LTS 1.12.0-2ubuntu0.1~Fips1~rc11

ubuntu advisories UBUNTU-CVE-2026-41989

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 RHEL 8 1.8.5-8.el8_10
  • libgcrypt RHEL 10.2 1.11.0-7.el10_2
  • libgcrypt RHEL 9 1.10.0-13.el9_8
  • libgcrypt hummingbird 1 1.12.2-1.hum1
  • libgcrypt RHEL 8.6 EUS_LONG_LIFE, RHEL 8.6 AUS 1.8.5-7.el8_6.1
  • libgcrypt RHEL 8.4 EUS_LONG_LIFE, RHEL 8.4 AUS 1.8.5-4.el8_4.1
  • libgcrypt RHEL 8.8 TUS, RHEL 8.8 E4S 1.8.5-7.el8_8.1
  • libgcrypt enterprise linux eus 10.0 1.11.0-5.el10_0.1

red hat advisories RHSA-2026:58978RHSA-2026:58979RHSA-2026:58977RHSA-2026:47117RHSA-2026:52951RHSA-2026:52952

  • libgcrypt SLE Micro 5.4, SLE Micro 5.3 1.9.4-150400.6.14.1
  • libgcrypt SLE Micro 5.5 1.9.4-150500.12.6.1
  • libgcrypt Linux Micro 6.0 1.10.3-4.1
  • libgcrypt Linux Micro 6.1 1.10.3-slfo.1.1_4.1
  • libgcrypt SLE Module for Basesystem 15 SP7 1.11.0-150700.5.10.1
  • libgcrypt SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 1.12.1-160000.3.1

suse advisories SUSE-SU-2026:3921-1SUSE-SU-2026:3491-1SUSE-SU-2026:22919-1SUSE-SU-2026:22907-1SUSE-SU-2026:3182-1SUSE-SU-2026:22760-1

  • libgcrypt openSUSE Leap 16.0 1.12.1-160000.3.1

opensuse advisories openSUSE-SU-2026:21387-1

  • libgcrypt AlmaLinux 10 1.11.0-7.el10_2
  • libgcrypt AlmaLinux 9 1.10.0-13.el9_8
  • libgcrypt AlmaLinux 8 1.8.5-8.el8_10

almalinux advisories ALSA-2026:50144ALSA-2026:50147ALSA-2026:47117

  • libgcrypt Rocky Linux 8 1.8.5-8.el8_10
  • libgcrypt Rocky Linux 10 1.11.0-7.el10_2
  • libgcrypt Rocky Linux 9 1.10.0-13.el9_8

rocky linux advisories RLSA-2026:47117RLSA-2026:50144RLSA-2026:50147

  • libgcrypt Azure Linux 3.0 1.10.3-2

azure linux advisories AZL-83544

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2026-41989 updated cvss 7.5

Libgcrypt: Libgcrypt: Denial of Service and buffer overflow via crafted ECDH ciphertext

  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17 cert-manager/cert-manager-operator-rhel9 1791788287, cert-manager/jetstack-cert-manager-rhel9 1791371069, cert-manager/cert-manager-istio-csr-rhel9 1791378395, cert-manager/cert-manager-operator-bundle 1791970484, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791371080
    fixed: vendor fix RHSA-2026:82336
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18 cert-manager/cert-manager-operator-rhel9 1789029076, cert-manager/jetstack-cert-manager-rhel9 1791459711, cert-manager/cert-manager-istio-csr-rhel9 1791459759, cert-manager/cert-manager-operator-bundle 1791966259, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791459707
    fixed: vendor fix RHSA-2026:82354
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 cert-manager/cert-manager-operator-rhel9 1790272426, cert-manager/cert-manager-operator-rhel9 1790589855, cert-manager/jetstack-cert-manager-rhel9 1790223279, cert-manager/jetstack-cert-manager-rhel9 1790589912, cert-manager/cert-manager-istio-csr-rhel9 1790223719, cert-manager/cert-manager-istio-csr-rhel9 1790589914, +2 more
    fixed: vendor fix RHSA-2026:72475
  • Red Hat AI Inference Server 3.5 rhaii/vllm-gaudi-rhel9 1791427182, rhaii/vllm-spyre-rhel9 1791818357
    fixed: vendor fix RHSA-2026:82061
  • Red Hat Discovery 2 discovery/discovery-ui-rhel9 1786634825, discovery/discovery-server-rhel9 1786638573
    fixed: vendor fix RHSA-2026:54760
  • Red Hat Enterprise Linux AppStream (v. 9) libgcrypt-devel 1.10.0-13.el9_8, libgcrypt-debuginfo 1.10.0-13.el9_8, libgcrypt-debugsource 1.10.0-13.el9_8, libgcrypt-devel-debuginfo 1.10.0-13.el9_8
    fixed: vendor fix RHSA-2026:50147
  • Red Hat Enterprise Linux AppStream (v. 10) libgcrypt-devel 1.11.0-7.el10_2, libgcrypt-debuginfo 1.11.0-7.el10_2, libgcrypt-debugsource 1.11.0-7.el10_2, libgcrypt-devel-debuginfo 1.11.0-7.el10_2
    fixed: vendor fix RHSA-2026:50144
  • Red Hat Enterprise Linux BaseOS (v. 8) libgcrypt 1.8.5-8.el8_10
    fixed: vendor fix RHSA-2026:47117
show 21 more
  • Red Hat Enterprise Linux BaseOS (v. 9) libgcrypt 1.10.0-13.el9_8
    fixed: vendor fix RHSA-2026:50147
  • Red Hat Enterprise Linux BaseOS (v. 10) libgcrypt 1.11.0-7.el10_2
    fixed: vendor fix RHSA-2026:50144
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) libgcrypt 1.8.5-4.el8_4.1
    fixed: vendor fix RHSA-2026:58979
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) libgcrypt 1.8.5-7.el8_6.1
    fixed: vendor fix RHSA-2026:58978
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) libgcrypt 1.8.5-7.el8_8.1
    fixed: vendor fix RHSA-2026:58977
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) libgcrypt 1.10.0-10.el9_2.2
    fixed: vendor fix RHSA-2026:52953
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) libgcrypt 1.10.0-10.el9_4.2
    fixed: vendor fix RHSA-2026:52952
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) libgcrypt 1.11.0-5.el10_0.1
    fixed: vendor fix RHSA-2026:52951
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) libgcrypt 1.10.0-11.el9_6.1
    fixed: vendor fix RHSA-2026:52950
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) libgcrypt 1.8.5-4.el8_4.1
    fixed: vendor fix RHSA-2026:58979
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) libgcrypt 1.8.5-7.el8_6.1
    fixed: vendor fix RHSA-2026:58978
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) libgcrypt 1.8.5-7.el8_8.1
    fixed: vendor fix RHSA-2026:58977
  • Red Hat Hardened Images libgcrypt 1.12.2-1.hum1
    fixed: vendor fix RHSA-2026:8466
  • Red Hat Insights proxy 1.5 insights-proxy/insights-proxy-container-rhel9 1786433656
    fixed: vendor fix RHSA-2026:53371
  • Red Hat OpenShift AI 3.0 rhai/base-image-cpu-rhel9 1790277045, rhai/base-image-tpu-rhel9 1790276884, rhai/base-image-cuda-rhel9 1790276974, rhai/base-image-rocm-rhel9 1790276886, rhai/base-image-spyre-rhel9 1790276889
    fixed: vendor fix RHSA-2026:73960
  • Red Hat OpenShift AI 3.2 rhai/base-image-cpu-rhel9 1790703590, rhai/base-image-tpu-rhel9 1790703497, rhai/base-image-cuda-rhel9 1790703586, rhai/base-image-rocm-rhel9 1790703494, rhai/base-image-rocm-rhel9 1790703506, rhai/base-image-spyre-rhel9 1790703568
    fixed: vendor fix RHSA-2026:74460
  • Red Hat OpenShift AI 3.4 rhai/base-image-neuron-rhel9 1790703542
    fixed: vendor fix RHSA-2026:74674
  • Red Hat Update Infrastructure 5 rhui5/cds-rhel9 1786533457, rhui5/rhua-rhel9 1786533529, rhui5/haproxy-rhel9 1786533449, rhui5/rhua-tp-rhel9 1787241260, rhui5/installer-rhel9 1786435483, rhui5/installer-tp-rhel9 1787135742, +2 more
    fixed: vendor fix RHSA-2026:54387
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 cert-manager/jetstack-cert-manager-acmesolver-rhel9 1790223630 Red Hat Enterprise Linux 6 libgcrypt Red Hat Enterprise Linux 7 libgcrypt
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 8 thunderbird Red Hat Enterprise Linux 9 thunderbird Red Hat Enterprise Linux 10 thunderbird
    not affected: component not present
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) libgcrypt-devel 1.10.0-10.el9_2.2, libgcrypt-debuginfo 1.10.0-10.el9_2.2, libgcrypt-debugsource 1.10.0-10.el9_2.2, libgcrypt-devel-debuginfo 1.10.0-10.el9_2.2 Red Hat Enterprise Linux AppStream E4S (v.9.4) libgcrypt-devel 1.10.0-10.el9_4.2, libgcrypt-debuginfo 1.10.0-10.el9_4.2, libgcrypt-debugsource 1.10.0-10.el9_4.2, libgcrypt-devel-debuginfo 1.10.0-10.el9_4.2 Red Hat Enterprise Linux AppStream EUS (v. 10.0) libgcrypt-devel 1.11.0-5.el10_0.1, libgcrypt-debuginfo 1.11.0-5.el10_0.1, libgcrypt-debugsource 1.11.0-5.el10_0.1, libgcrypt-devel-debuginfo 1.11.0-5.el10_0.1 Red Hat Enterprise Linux AppStream EUS (v.9.6) libgcrypt-devel 1.10.0-11.el9_6.1, libgcrypt-debuginfo 1.10.0-11.el9_6.1, libgcrypt-debugsource 1.10.0-11.el9_6.1, libgcrypt-devel-debuginfo 1.10.0-11.el9_6.1 Red Hat Enterprise Linux BaseOS AUS (v.8.4) libgcrypt-devel 1.8.5-4.el8_4.1, libgcrypt-debuginfo 1.8.5-4.el8_4.1, libgcrypt-debugsource 1.8.5-4.el8_4.1, libgcrypt-devel-debuginfo 1.8.5-4.el8_4.1 Red Hat Enterprise Linux BaseOS AUS (v.8.6) libgcrypt-devel 1.8.5-7.el8_6.1, libgcrypt-debuginfo 1.8.5-7.el8_6.1, libgcrypt-debugsource 1.8.5-7.el8_6.1, libgcrypt-devel-debuginfo 1.8.5-7.el8_6.1
    +2 more products
    Red Hat Enterprise Linux BaseOS E4S (v.8.8) libgcrypt-devel 1.8.5-7.el8_8.1, libgcrypt-debuginfo 1.8.5-7.el8_8.1, libgcrypt-debugsource 1.8.5-7.el8_8.1, libgcrypt-devel-debuginfo 1.8.5-7.el8_8.1 Red Hat Enterprise Linux BaseOS E4S (v.9.2) libgcrypt-debuginfo 1.10.0-10.el9_2.2, libgcrypt-debugsource 1.10.0-10.el9_2.2, libgcrypt-devel-debuginfo 1.10.0-10.el9_2.2
    not affected: vulnerable code not present

9 more not affected in the full advisory

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 ICSA-26-295-11 updated cvss 6.7

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.7 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.7
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

cisa ICSA-26-209-04 updated cvss 6.7

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.6 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.6
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.7 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
OSV 3.1 6.7 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia Libgcrypt_jll
>=1.8.11+0, <1.12.2+0
1.12.2+0

Affected products

  • gnupg Libgcrypt
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

References

Sources

Fencer Vulns 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.