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SUSE Linux Micro 6.1 glibc Important DNS Security Update 2026-21039-1

suse
Calendar Grey April 13, 2026
Dist Suse Esm H88
Update resolves two important vulnerabilities in glibc for SUSE Linux Micro, enhancing security against DNS shortcomings.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for glibc fixes the following issues: * CVE-2026-4437: incorrect DNS response parsing via crafted DNS server response (bsc#1260078). * CVE-2026-4438: invalid DNS hostname returned via gethostbyaddr functions (bsc#1260082). ## 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 6.1 zypper in -t patch SUSE-SLE-Micro-6.1-478=1 ## Package List: * SUSE Linux Micro 6.1 (aarch64 ppc64le s390x x86_64) * glibc-devel-debuginfo-2.38-slfo.1.1_7.1 * glibc-devel-2.38-slfo.1.1_7.1 * glibc-locale-2.38-slfo.1.1_7.1 * glibc-locale-base-2.38-slfo.1.1_7.1 * glibc-debugsource-2.38-slfo.1.1_7.1

Topics%20covered

Topics Covered

security advisory SuSE important glibc DNS issue

References

* bsc#1260078

* bsc#1260082

Cross-

* CVE-2026-4437

* CVE-2026-4438

CVSS scores:

* CVE-2026-4437 ( SUSE ): 5.7

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

* CVE-2026-4437 ( SUSE ): 4.7 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

* CVE-2026-4437 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-4438 ( SUSE ): 5.7

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

* CVE-2026-4438 ( SUSE ): 4.7 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

* CVE-2026-4438 ( NVD ): 5.4 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Products:

* SUSE Linux Micro 6.1

An update that solves two vulnerabilities can now be installed.

##

* https://www.suse.com/security/cve/CVE-2026-4437.html

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:21039-1
Release Date: 2026-04-09T11:38:10Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE important glibc DNS issue

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