CVE-2026-14957 Common Vulnerabilities and Exposures

Upstream information

CVE-2026-14957 at MITRE

Description

In FIPS mode, Libreswan's add_decoded_cert() function calls CERT_ExtractPublicKey() and asserts that the result is not NULL. However, CERT_ExtractPublicKey() returns NULL when public key extraction fails, for example if the RSA exponent is set to 0. A remote attacker can send a malformed X.509 certificate in a CERT payload to trigger the assertion, causing the pluto daemon to abort and restart. Continued exploitation causes a denial of service. No remote code execution is possible. Both IKEv1 and IKEv2 are affected. The vulnerability is only exploitable when both the OS and libreswan are running in FIPS mode and at least one CA certificate is loaded. The CERT payload is processed before peer authentication, so no credentials are needed to exploit this. Configurations using only PreSharedKey (PSK) authentication with no CA certificates loaded in the NSS database are not vulnerable.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail	SUSE
Base Score	7.5
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality Impact	None
Integrity Impact	None
Availability Impact	High
CVSSv3 Version	3.1

CVSS v4 Scores
CVSS detail	SUSE
Base Score	8.7
Vector	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	None
Privileges Required	None
User Interaction	None
Vulnerable System Confidentiality Impact	None
Vulnerable System Integrity Impact	None
Vulnerable System Availability Impact	High
Subsequent System Confidentiality Impact	None
Subsequent System Integrity Impact	None
Subsequent System Availability Impact	None
CVSSv4 Version	4.0

No SUSE Bugzilla entries cross referenced.

SUSE Security Advisories:

RHSA-2026:46396, published Mon Jul 27 15:06:34 UTC 2026
RHSA-2026:46397, published Mon Jul 27 15:06:34 UTC 2026
RHSA-2026:46398, published Mon Jul 27 15:06:35 UTC 2026
RHSA-2026:57741, published Tue Aug 25 15:07:57 UTC 2026

List of released packages

Product(s)	Fixed package version(s)	References
SUSE Liberty Linux 10	`libreswan >= 5.3.2-1.el10_2` `libreswan-minimal >= 5.3.2-1.el10_2`	Patchnames: RHSA-2026:46398 (x86_64)
SUSE Liberty Linux 8	`libreswan >= 4.12-2.el8_10.6`	Patchnames: RHSA-2026:46396 (x86_64)
SUSE Liberty Linux 9	`libreswan >= 4.15-10.el9_8`	Patchnames: RHSA-2026:46397 (x86_64) RHSA-2026:57741 (x86_64)

SUSE Timeline for this CVE

CVE page created: Mon Jul 27 14:34:10 2026
CVE page last modified: Wed Sep 2 12:04:18 2026