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SUSE SLED15 / SLES15 Security Update : zchunk (SUSE-SU-2026:5138-1)

medium Nessus Plugin ID 378049

Synopsis

The remote SUSE host is missing a security update.

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:5138-1 advisory.

 This update for zchunk fixes the following issue:

 - CVE-2026-117556: heap out-of-bounds read in `read_preface()` allows attackers to cause an application crash via a crafted `.zck` file (bsc#1288144).

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

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

Solution

Update the affected libzck-devel, libzck1 and / or zchunk packages.

See Also

https://bugzilla.suse.com/1288144

https://www.suse.com/security/cve/CVE-2026-117556

http://www.nessus.org/u?0940b328

Plugin Details

Severity: Medium

ID: 378049

File Name: suse_SU-2026-5138-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 11/10/2026

Updated: 11/10/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-117556

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

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

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

CVSS v4

Risk Factor: Medium

Base Score: 5.3

Threat Score: 1.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:libzck-devel, p-cpe:/a:novell:suse_linux:libzck1, p-cpe:/a:novell:suse_linux:zchunk

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: 11/9/2026

Vulnerability Publication Date: 10/27/2026

Reference Information

CVE: CVE-2026-117556

SuSE: SUSE-SU-2026:5138-1