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Vulnerability · Published Feb 9, 2026 · Assigned by redhat

CVE-2025-14831Gnutls: gnutls: denial of service via excessive resource consumption during certificate verification

Medium 5.3

In plain English

A medium-severity security flaw in gnutls. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.7%top 48.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in GnuTLS. This vulnerability allows a denial of service (DoS) by excessive CPU (Central Processing Unit) and memory consumption via specially crafted malicious certificates containing a large number of name constraints and subject alternative names (SANs).

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10gnutls3.8.10-3.el10_1ALSA-2026:3477
AlmaLinux:8gnutls3.6.16-8.el8_10.5ALSA-2026:5585
AlmaLinux:9gnutls3.8.3-10.el9_7ALSA-2026:4188
AlmaLinux:10gnutls-c++3.8.10-3.el10_1ALSA-2026:3477
AlmaLinux:8gnutls-c++3.6.16-8.el8_10.5ALSA-2026:5585
AlmaLinux:9gnutls-c++3.8.3-10.el9_7ALSA-2026:4188
AlmaLinux:10gnutls-dane3.8.10-3.el10_1ALSA-2026:3477
AlmaLinux:8gnutls-dane3.6.16-8.el8_10.5ALSA-2026:5585
AlmaLinux:9gnutls-dane3.8.3-10.el9_7ALSA-2026:4188
AlmaLinux:10gnutls-devel3.8.10-3.el10_1ALSA-2026:3477
AlmaLinux:8gnutls-devel3.6.16-8.el8_10.5ALSA-2026:5585
AlmaLinux:9gnutls-devel3.8.3-10.el9_7ALSA-2026:4188
AlmaLinux:10gnutls-fips3.8.10-3.el10_1ALSA-2026:3477
AlmaLinux:10gnutls-utils3.8.10-3.el10_1ALSA-2026:3477
AlmaLinux:8gnutls-utils3.6.16-8.el8_10.5ALSA-2026:5585
AlmaLinux:9gnutls-utils3.8.3-10.el9_7ALSA-2026:4188
Alpine:v3.20gnutls3.8.12-r0ALPINE-CVE-2025-14831
Alpine:v3.21gnutls3.8.12-r0ALPINE-CVE-2025-14831
Alpine:v3.22gnutls3.8.12-r0ALPINE-CVE-2025-14831
Alpine:v3.23gnutls3.8.12-r0ALPINE-CVE-2025-14831
Alpine:v3.24gnutls3.8.12-r0ALPINE-CVE-2025-14831
Debian:12gnutls283.7.9-2+deb12u6DEBIAN-CVE-2025-14831
Debian:12gnutls283.7.9-2+deb12u6DSA-6140-1
Debian:13gnutls283.8.9-3+deb13u2DSA-6140-1
Debian:13gnutls283.8.9-3+deb13u2DEBIAN-CVE-2025-14831
Debian:14gnutls283.8.12-1DEBIAN-CVE-2025-14831
Rocky Linux:10gnutls0:3.8.10-3.el10_1RLSA-2026:3477
Rocky Linux:8gnutls0:3.6.16-8.el8_10.5RLSA-2026:5585
Rocky Linux:9gnutls0:3.8.3-10.el9_7RLSA-2026:4188
Ubuntu:22.04:LTSgnutls283.7.3-4ubuntu1.8USN-8043-1
Ubuntu:22.04:LTSgnutls283.7.3-4ubuntu1.8UBUNTU-CVE-2025-14831
Ubuntu:24.04:LTSgnutls283.8.3-1.1ubuntu3.5USN-8043-1
Ubuntu:24.04:LTSgnutls283.8.3-1.1ubuntu3.5UBUNTU-CVE-2025-14831
Ubuntu:25.10gnutls283.8.9-3ubuntu2.1USN-8043-1
Ubuntu:25.10gnutls283.8.9-3ubuntu2.1UBUNTU-CVE-2025-14831

Affected products (as reported)

VendorProductVersions
gnutls 0
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat RHEL-8 based Middleware Containers see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 see references

Weakness: CWE-407 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References