ELSA-2026-46397: libreswan security update

ELSA-2026-46397, released July 27, 2026, fixes 4 CVEs in libreswan (version 0:4.15-10.0.1.el9_8). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

8.1

Base score, 0 to 10

Highest EPSS

0.0060

48th percentile

Priority of the 4 CVEs

Patch now 0
                                Urgent 0
                                High 4
                                Routine 0

Fixed package versions

Product	Release	Fixed in
libreswan	ol 9	0:4.15-10.0.1.el9_8

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-12413	IKEv2 Denial of Service via malformed fragmentation	7.5	0.0060	None reported
High	CVE-2026-14957	FIPS mode assertion failure via malicious CERT payload	7.5	0.0047	None reported
High	CVE-2026-50721	IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload	8.1	0.0039	None reported
High	CVE-2026-50722	IKEv2 Denial of Service via RSA-SHA1 (PKCS#1 RSASSA-PKCS1-v1_5) authentication payload	8.1	0.0035	None reported

Also fixes CVE-2026-12413

RLSA-2026:46398
libreswan on rocky 10
RHSA-2026:55449
libreswan on RHEL 10
RLSA-2026:46396
libreswan on rocky 8
RHSA-2026:46397
libreswan on RHEL 9
RHSA-2026:46396
libreswan on RHEL 8
RLSA-2026:46397
libreswan on rocky 9
ALSA-2026:46396
libreswan on almalinux 8
ALSA-2026:46397
libreswan on almalinux 9

Vendor advisory

https://linux.oracle.com/errata/ELSA-2026-46397.html

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