Debian dsa-6404 : expat - security update

high Nessus Plugin ID 330837

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6404 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6404-1 [email protected] https://www.debian.org/security/ Aron Xu July 30, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : expat CVE ID : CVE-2025-59375 CVE-2026-24515 CVE-2026-25210 CVE-2026-32776 CVE-2026-32777 CVE-2026-32778 CVE-2026-41080 CVE-2026-45186 CVE-2026-50219 CVE-2026-56131 CVE-2026-56132 CVE-2026-56403 CVE-2026-56404 CVE-2026-56405 CVE-2026-56406 CVE-2026-56407 CVE-2026-56408 CVE-2026-56409 CVE-2026-56410 CVE-2026-56411 CVE-2026-56412

Multiple security issues were discovered in expat, an XML parsing C library, including integer overflows, out-of-bounds write, NULL pointer dereferences, excessive resource consumption, and memory corruption through re-entrant parser API calls, which may result in denial of service or potentially the execution of arbitrary code.

For the stable distribution (trixie), this problem has been fixed in version 2.8.2-1~deb13u1.

We recommend that you upgrade your expat packages.

For the detailed security status of expat please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/expat

Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/

Mailing list: [email protected]

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the expat packages.

Plugin Details

Severity: High

ID: 330837

File Name: debian_DSA-6404.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 7/30/2026

Updated: 7/30/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.7

Percentile: 96.48

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-25210

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:expat, p-cpe:/a:debian:debian_linux:libexpat1-dev, p-cpe:/a:debian:debian_linux:libexpat1-udeb, p-cpe:/a:debian:debian_linux:libexpat1

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/30/2026

Vulnerability Publication Date: 9/15/2025

Reference Information

CVE: CVE-2025-59375, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2026-41080, CVE-2026-45186, CVE-2026-50219, CVE-2026-56131, CVE-2026-56132, CVE-2026-56403, CVE-2026-56404, CVE-2026-56405, CVE-2026-56406, CVE-2026-56407, CVE-2026-56408, CVE-2026-56409, CVE-2026-56410, CVE-2026-56411, CVE-2026-56412

IAVA: 2025-A-0687-S, 2026-A-0100-S, 2026-A-0407-S, 2026-A-0451, 2026-A-0650

Detections

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