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CVE-2025-14831

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

MEDIUM
5.3
CVSS Score
Published: February 9, 2026 at 02:51 PM UTC
Updated: October 14, 2026 at 08:17 PM UTC
3 products affected across 2 vendorsEnterprise LinuxOpenShift Container PlatformSIMATIC CN 4100

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Enterprise Linux· Red Hatrpm
90%
All versions6
Vendor states this is fixed in 0:3.6.14-10.el8_4.1 (unaffected)
Vendor states this is fixed in 0:3.6.16-5.el8_6.5 (unaffected)
Vendor states this is fixed in 0:3.6.16-7.el8_8.4 (unaffected)
Vendor states this is fixed in 0:3.6.16-8.el8_10.5 (unaffected)
Vendor states this is fixed in 0:3.7.6-21.el9_2.5 (unaffected)
Vendor states this is fixed in 0:3.8.10-3.el10_1 (unaffected)
Vendor states this is fixed in 0:3.8.3-10.el9_7 (unaffected)
Vendor states this is fixed in 0:3.8.3-4.el9_4.5 (unaffected)
Vendor states this is fixed in 0:3.8.3-6.el9_6.3 (unaffected)
Vendor states this is fixed in 0:3.8.9-9.el10_0.17 (unaffected)
Vendor states this is fixed in 0:4.13-3.el8_4.1 (unaffected)
Vendor states this is fixed in 0:4.13-3.el8_6.2 (unaffected)
Vendor states this is fixed in 0:4.13-4.el8_8.1 (unaffected)
OpenShift Container Platform· Red Hatcontainer
90%
All versions4
SIMATIC CN 4100· Siemens
60%
v < V5.0
Affected range stops below V5.0, so it looks safe — our inference, not a vendor statement

References (32)

VDB Entryx_refsource_REDHAT
Source: [email protected]
https://access.redhat.com/security/cve/CVE-2025-14831
Issue Trackingx_refsource_REDHAT
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2423177
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:3477
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:4188
Source: cverecord
https://gitlab.com/gnutls/gnutls/-/issues/1773
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:4655
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:4943
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:5606

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-407

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