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SUSE SLES15 / openSUSE 15 Security Update : expat (SUSE-SU-2026:1166-1)

medium Nessus Plugin ID 304857

Synopsis

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

Description

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1166-1 advisory.

 - CVE-2026-32776: NULL pointer dereference when processing empty external parameter entities inside an entity declaration value (bsc#1259726).
 - CVE-2026-32777: denial of service due to infinite loop in DTD content parsing (bsc#1259711).
 - CVE-2026-32778: NULL pointer dereference in `setContext` on retry after an out-of-memory condition (bsc#1259729).

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 packages.

See Also

https://bugzilla.suse.com/1259711

https://bugzilla.suse.com/1259726

https://bugzilla.suse.com/1259729

https://www.suse.com/security/cve/CVE-2026-32776

https://www.suse.com/security/cve/CVE-2026-32777

https://www.suse.com/security/cve/CVE-2026-32778

https://lists.suse.com/pipermail/sle-updates/2026-April/045260.html

Plugin Details

Severity: Medium

ID: 304857

File Name: suse_SU-2026-1166-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/4/2026

Updated: 4/4/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

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

CVSS Score Source: CVE-2026-32778

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:libexpat1-32bit, p-cpe:/a:novell:suse_linux:libexpat1, p-cpe:/a:novell:suse_linux:expat, p-cpe:/a:novell:suse_linux:libexpat-devel, cpe:/o:novell:suse_linux:15

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/2/2026

Vulnerability Publication Date: 3/16/2026

Reference Information

CVE: CVE-2026-32776, CVE-2026-32777, CVE-2026-32778

SuSE: SUSE-SU-2026:1166-1