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AlmaLinux 8 : libreswan (ALSA-2026:90492)

high Nessus Plugin ID 372205

Synopsis

The remote AlmaLinux host is missing one or more security updates.

Description

The remote AlmaLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2026:90492 advisory.

 * libreswan: IKEv2 Use-After-Free bug when using IKE-over-TCP (CVE-2026-94453)
 * libreswan: IKEv2 pre-authentication Null Pointer deref in EAP code (CVE-2026-77206)
 * libreswan: Null Pointer Dereference in PKCS#7 bundle with no CERTS (CVE-2026-77207)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected libreswan package.

See Also

https://access.redhat.com/errata/RHSA-2026:90492

https://errata.almalinux.org/8/ALSA-2026-90492.html

Plugin Details

Severity: High

ID: 372205

File Name: alma_linux_ALSA-2026-90492.nasl

Version: 1.1

Type: Local

Published: 10/27/2026

Updated: 10/27/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-94453

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:alma:linux:8, cpe:/o:alma:linux:8::appstream, cpe:/o:alma:linux:8::baseos, cpe:/o:alma:linux:8::highavailability, cpe:/o:alma:linux:8::nfv, cpe:/o:alma:linux:8::powertools, cpe:/o:alma:linux:8::realtime, cpe:/o:alma:linux:8::resilientstorage, cpe:/o:alma:linux:8::sap, cpe:/o:alma:linux:8::sap_hana, cpe:/o:alma:linux:8::supplementary, p-cpe:/a:alma:linux:libreswan

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 10/26/2026

Vulnerability Publication Date: 10/13/2026

Reference Information

CVE: CVE-2026-77206, CVE-2026-77207, CVE-2026-94453

CWE: 416, 476

RHSA: 2026:90492