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MEDIUM

CVE-2025-14831

Gnutls: gnutls: denial of service via excessive resource consumption during certificate verification

CVSS v3

5.3

MEDIUM

EPSS Score

0.7 %

exploit probability, as of 2026-10-15

CISA KEV

No

known exploited

Exploitation

none

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • gnutlsAlmaLinux:10all versions · fixed in 3.8.10-3.el10_1and 5 other packages
  • gnutlsAlmaLinux:9all versions · fixed in 3.8.3-10.el9_7and 4 other packages
  • gnutlsAlmaLinux:8all versions · fixed in 3.6.16-8.el8_10.5and 4 other packages

Vendor advisories

  • CVE-2025-14831 Red Hat Product Security841 products fixed · 13 known affected

    gnutls: GnuTLS: Denial of Service via excessive resource consumption during certificate verification

    gnutls as a component of Red Hat Enterprise Linux 6 · gnutls-devel as a component of Red Hat Enterprise Linux 6 · gnutls-guile as a component of Red Hat Enterprise Linux 6

  • RHSA-2026:33125 Red Hat Product Security88 products fixed

    Red Hat Security Advisory: gnutls and libtasn1 security update

  • RHSA-2026:30849 Red Hat Product Security88 products fixed

    Red Hat Security Advisory: gnutls and libtasn1 security update

  • RHSA-2026:30850 Red Hat Product Security100 products fixed

    Red Hat Security Advisory: gnutls and libtasn1 security update

  • RHSA-2026:25096 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: Red Hat AI Inference Server Model Optimization Tools 3.2.2 (cuda)

  • RHSA-2026:16174 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat AI Inference Server 3.3.3 (Spyre)

21 more advisories

Full record on NVD

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).

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Published
2026-02-09
Last Modified
2026-05-05

Frequently asked questions

What is CVE-2025-14831?

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).

Is CVE-2025-14831 actively exploited?

Active exploitation of CVE-2025-14831 has not been confirmed. Its EPSS score was 0.7% on 2026-10-15, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-14831?

CVE-2025-14831 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

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