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Fencer Vulns
high 7.5

CVE-2025-13151 json

CVE-2025-13151

published 2026-01-07 10 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-206262

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

Summary

Stack-based buffer overflow in libtasn1 version: v4.20.0. The function fails to validate the size of input data resulting in a buffer overflow in asn1_expend_octet_string.

Patch / fix

  • libtasn1-6 Debian 13 4.20.0-2+deb13u1
  • libtasn1-6 Debian 14 4.21.0-2

debian advisories DEBIAN-CVE-2025-13151

  • libtasn1-6 Ubuntu 22.04 LTS 4.18.0-4ubuntu0.2
  • libtasn1-6 Ubuntu 24.04 LTS 4.19.0-3ubuntu0.24.04.2
  • libtasn1-6 Ubuntu 25.10 4.20.0-2ubuntu0.25.10.1
  • libtasn1-6 Ubuntu Pro 14.04 LTS 3.4-3ubuntu0.6+esm1
  • libtasn1-6 Ubuntu Pro 16.04 LTS 4.7-3ubuntu0.16.04.3+esm4
  • libtasn1-6 Ubuntu Pro 18.04 LTS 4.13-2ubuntu0.1~esm1
  • libtasn1-6 Ubuntu Pro 20.04 LTS 4.16.0-2ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2025-13151

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

  • libtasn1 RHEL 8 4.13-6.el8_10
  • libtasn1-tools RHEL 8 4.13-6.el8_10
  • libtasn1 RHEL 9 4.16.0-10.el9_8
  • libtasn1-tools RHEL 9 4.16.0-10.el9_8
  • libtasn1 RHEL 10.2 4.20.0-5.el10_2
  • libtasn1-tools RHEL 10.2 4.20.0-5.el10_2
  • libtasn1 hummingbird 1 4.21.0-1.1.hum1
  • libtasn1-tools hummingbird 1 4.21.0-1.1.hum1

red hat advisories RHSA-2026:36728RHSA-2026:28253RHSA-2026:28235RHSA-2026:7500

  • libtasn1 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 4.21.0-160000.1.1
  • libtasn1 SLE Module for Basesystem 15 SP7, SLE Micro 5.5, SLE Micro 5.4 +3 more 4.13-150000.4.14.1
  • libtasn1 Linux Micro 6.1 4.19.0-slfo.1.1_3.1
  • libtasn1 Linux Micro 6.0 4.19.0-5.1
  • libtasn1 SLES LTSS Extended Security 12 SP5 4.9-3.19.1

suse advisories SUSE-SU-2026:21001-1SUSE-SU-2026:21142-1SUSE-SU-2026:0224-1SUSE-SU-2026:20355-1SUSE-SU-2026:0118-1SUSE-SU-2026:20051-1

  • libtasn1 openSUSE Leap 16.0 4.21.0-160000.1.1
  • libtasn1 openSUSE Tumbleweed 4.21.0-1.1

opensuse advisories openSUSE-SU-2026:20470-1openSUSE-SU-2026:10033-1

  • libtasn1 AlmaLinux 8 4.13-6.el8_10
  • libtasn1-tools AlmaLinux 8 4.13-6.el8_10
  • libtasn1 AlmaLinux 10 4.20.0-5.el10_2
  • libtasn1-tools AlmaLinux 10 4.20.0-5.el10_2
  • libtasn1 AlmaLinux 9 4.16.0-10.el9_8
  • libtasn1-tools AlmaLinux 9 4.16.0-10.el9_8

almalinux advisories ALSA-2026:36728ALSA-2026:28235ALSA-2026:28253

  • libtasn1 Rocky Linux 8 4.13-6.el8_10
  • libtasn1 Rocky Linux 10 4.20.0-5.el10_2
  • libtasn1 Rocky Linux 9 4.16.0-10.el9_8

rocky linux advisories RLSA-2026:36728RLSA-2026:28235RLSA-2026:28253

  • libtasn1 Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 4.21.0-r0

alpine advisories ALPINE-CVE-2025-13151

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libtasn1 CBL-Mariner 2.0, Azure Linux 3.0 4.19.0-3
  • gnutls Azure Linux 3.0 3.8.3-8
  • gnutls CBL-Mariner 2.0 3.7.11-6

azure linux advisories AZL-73664AZL-74006AZL-74046AZL-74070

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-2025-13151 updated cvss 5.9

libtasn1: libtasn1: Denial of Service via stack-based buffer overflow in asn1_expend_octet_string

  • Red Hat Enterprise Linux 6 libtasn1, libtasn1-tools Red Hat Enterprise Linux 7 libtasn1, libtasn1-tools 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 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-operator-bundle 1791970484, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791371080
    fixed: vendor fix RHSA-2026:82888
  • 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-trust-manager-rhel9 1790598593
    fixed: vendor fix RHSA-2026:72502
  • Red Hat Discovery 2 discovery/discovery-ui-rhel9 1782756541, discovery/discovery-server-rhel9 1782763840
    fixed: vendor fix RHSA-2026:33313
  • Red Hat Enterprise Linux AppStream (v. 8) libtasn1-tools 4.13-6.el8_10
    fixed: vendor fix RHSA-2026:36728
  • Red Hat Enterprise Linux AppStream (v. 9) libtasn1-tools 4.16.0-10.el9_8
    fixed: vendor fix RHSA-2026:28253
  • Red Hat Enterprise Linux AppStream (v. 10) libtasn1-tools 4.20.0-5.el10_2
    fixed: vendor fix RHSA-2026:28235
show 7 more
  • Red Hat Enterprise Linux BaseOS (v. 8) libtasn1 4.13-6.el8_10
    fixed: vendor fix RHSA-2026:36728
  • Red Hat Enterprise Linux BaseOS (v. 9) libtasn1 4.16.0-10.el9_8
    fixed: vendor fix RHSA-2026:28253
  • Red Hat Enterprise Linux BaseOS (v. 10) libtasn1 4.20.0-5.el10_2
    fixed: vendor fix RHSA-2026:28235
  • Red Hat Hardened Images libtasn1 4.21.0-1.1.hum1, libtasn1-tools 4.21.0-1.1.hum1
    fixed: vendor fix RHSA-2026:7500
  • Red Hat Insights proxy 1.5 insights-proxy/insights-proxy-container-rhel9 1782890503
    fixed: vendor fix RHSA-2026:34102
  • Red Hat Update Infrastructure 5 rhui5/cds-rhel9 1784794778, rhui5/rhua-rhel9 1784795076, rhui5/haproxy-rhel9 1784795112, rhui5/rhua-tp-rhel9 1787241260, rhui5/installer-rhel9 1784794289, rhui5/installer-tp-rhel9 1787135742, +2 more
    fixed: vendor fix RHSA-2026:44481
  • Red Hat Update Infrastructure 5 rhui5/cds-tp-rhel9 1787241206
    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
yes
Technical impact
partial
Assessed
10 mo ago

Exploit prediction

1.37% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • GnuTLS libtasn1

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.