libreswan X.509 Certificate assertion

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1$0-$5k5.74

Summaryinfo

A vulnerability categorized as problematic has been discovered in libreswan. Affected by this vulnerability is an unknown functionality of the component X.509 Certificate Handler. The manipulation results in assertion. This vulnerability was named CVE-2026-14957. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic has been found in libreswan (affected version unknown). Affected is an unknown functionality of the component X.509 Certificate Handler. The manipulation with an unknown input leads to a assertion vulnerability. CWE is classifying the issue as CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. This is going to have an impact on availability.

The advisory is shared for download at bugzilla.redhat.com. This vulnerability is traded as CVE-2026-14957. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 330003 (Fedora 43 : libreswan (2026-146b86f436)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (330003). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Assertion
CWE: CWE-617
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 330003
Nessus Name: Fedora 43 : libreswan (2026-146b86f436)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/26/2026 Advisory disclosed
07/26/2026 +0 days VulDB entry created
07/26/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2026-14957 (🔒)
GCVE (CVE): GCVE-0-2026-14957
GCVE (VulDB): GCVE-100-383328

Entryinfo

Created: 07/26/2026 18:17
Updated: 07/26/2026 20:50
Changes: 07/26/2026 18:17 (16), 07/26/2026 18:32 (35), 07/26/2026 18:33 (2), 07/26/2026 20:50 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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