SUSE SLES16 Security Update : libarchive (SUSE-SU-2026:21831-1)

critical Nessus Plugin ID 317723

Synopsis

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

Description

The remote SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:21831-1 advisory.

This update for libarchive fixes the following issues

- CVE-2026-4111: logical deadlock the RAR5 filter subsystem and the half-window output limiter leads to infinite loop and DoS (bsc#1259635).
- CVE-2026-4424: 257-byte heap memory leak when processing a 170-byte RAR3 (bsc#1259928).
- CVE-2026-4426: undefined behavior due to unvalidated operand in shift expression of the zisofs decompression code (bsc#1259931).
- CVE-2026-5121: missing validation check for pz_log2_bs can a heap buffer overflow write (bsc#1261186).

Tenable has extracted the preceding description block directly from the SUSE 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 bsdtar, libarchive-devel and / or libarchive13 packages.

Plugin Details

Severity: Critical

ID: 317723

File Name: suse_SU-2026-21831-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 5/29/2026

Updated: 5/29/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-5121

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:libarchive-devel, p-cpe:/a:novell:suse_linux:bsdtar, p-cpe:/a:novell:suse_linux:libarchive13, cpe:/o:novell:suse_linux:16

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/25/2026

Vulnerability Publication Date: 3/13/2026

Reference Information

CVE: CVE-2026-4111, CVE-2026-4424, CVE-2026-4426, CVE-2026-5121

IAVA: 2026-A-0270

SuSE: SUSE-SU-2026:21831-1

Detections

Analytics