SUSE-SU-2025:20564-1: important: Security update for libxml2

Thu Aug 28 08:39:08 UTC 2025

# Security update for libxml2

Announcement ID: SUSE-SU-2025:20564-1  
Release Date: 2025-08-21T08:20:56Z  
Rating: important  
References:

  * bsc#1244554
  * bsc#1244555
  * bsc#1244557
  * bsc#1244580
  * bsc#1244700
  * bsc#1246296

Cross-References:

  * CVE-2025-49794
  * CVE-2025-49795
  * CVE-2025-49796
  * CVE-2025-6021
  * CVE-2025-6170
  * CVE-2025-7425

CVSS scores:

  * CVE-2025-49794 ( SUSE ):  8.8
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-49794 ( SUSE ):  8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
  * CVE-2025-49794 ( NVD ):  9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
  * CVE-2025-49795 ( SUSE ):  7.1
    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-49795 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-49795 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-49796 ( SUSE ):  8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
  * CVE-2025-49796 ( NVD ):  9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
  * CVE-2025-6021 ( SUSE ):  8.7
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-6021 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-6021 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-6170 ( SUSE ):  2.0
    CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2025-6170 ( SUSE ):  4.5 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
  * CVE-2025-6170 ( NVD ):  2.5 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
  * CVE-2025-6170 ( NVD ):  2.5 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
  * CVE-2025-7425 ( SUSE ):  7.3
    CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:H/SI:H/SA:H
  * CVE-2025-7425 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H
  * CVE-2025-7425 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:H

Affected Products:

  * SUSE Linux Micro 6.0

An update that solves six vulnerabilities can now be installed.

## Description:

This update for libxml2 fixes the following issues:

  * CVE-2025-6021: Integer Overflow in xmlBuildQName() Leads to Stack Buffer
    Overflow in libxml2 [bsc#1244580]
  * CVE-2025-6170: stack buffer overflow may lead to a crash [bsc#1244700]
  * CVE-2025-7425: Heap Use-After-Free in libxslt caused by atype corruption in
    xmlAttrPtr [bsc#1246296]
  * CVE-2025-49794: heap use after free (UAF) can lead to Denial of service
    (DoS) [bsc#1244554]
  * CVE-2025-49795: null pointer dereference may lead to Denial of service (DoS)
    [bsc#1244555]
  * CVE-2025-49796: type confusion may lead to Denial of service (DoS)
    [bsc#1244557]

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Micro 6.0  
    zypper in -t patch SUSE-SLE-Micro-6.0-429=1

## Package List:

  * SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    * libxml2-tools-2.11.6-10.1
    * libxml2-2-debuginfo-2.11.6-10.1
    * libxml2-2-2.11.6-10.1
    * libxml2-debugsource-2.11.6-10.1
    * libxml2-tools-debuginfo-2.11.6-10.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-49794.html
  * https://www.suse.com/security/cve/CVE-2025-49795.html
  * https://www.suse.com/security/cve/CVE-2025-49796.html
  * https://www.suse.com/security/cve/CVE-2025-6021.html
  * https://www.suse.com/security/cve/CVE-2025-6170.html
  * https://www.suse.com/security/cve/CVE-2025-7425.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1244554
  * https://bugzilla.suse.com/show_bug.cgi?id=1244555
  * https://bugzilla.suse.com/show_bug.cgi?id=1244557
  * https://bugzilla.suse.com/show_bug.cgi?id=1244580
  * https://bugzilla.suse.com/show_bug.cgi?id=1244700
  * https://bugzilla.suse.com/show_bug.cgi?id=1246296

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