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SUSE: 2025:02355-1 libxml2 Important Denial of Service Fixes

suse
Calendar Grey July 17, 2025
Dist Suse Esm H88
The latest security notification concerning libxml2 on SUSE outlines essential patches addressing significant vulnerabilities across various platforms.
* bsc#1244554 * bsc#1244557 * bsc#1244590 * bsc#1244700

Summary

## This update for libxml2 fixes the following issues: * CVE-2025-49794: Fixed a heap use after free which could lead to denial of service. (bsc#1244554) * CVE-2025-49796: Fixed type confusion which could lead to denial of service. (bsc#1244557) * CVE-2025-6170: Fixed a stack buffer overflow which could lead to a crash. (bsc#1244700) * CVE-2025-6021: Fixed an integer overflow in xmlBuildQName() which could lead to stack buffer overflow. (bsc#1244590) ## 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: * openSUSE Leap 15.4 zypper in -t patch SUSE-2025-2355=1 * SUSE Linux Enterprise Micro for Rancher 5.3 zypper in -t patch SUSE-SLE-Micro-5.3-2025-2355=1

Topics%20covered

Topics Covered

security advisory denial of service SuSE important heap overflow libxml2

References

* bsc#1244554

* bsc#1244557

* bsc#1244590

* bsc#1244700

Cross-

* CVE-2025-49794

* CVE-2025-49796

* CVE-2025-6021

* CVE-2025-6170

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-2025-49796 ( 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

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2025:02355-1
Release Date: 2025-07-17T13:02:50Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service SuSE important heap overflow libxml2

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