SUSE-SU-2026:20178-1: important: Security update for glibc

Mon Feb 2 16:30:16 UTC 2026

# Security update for glibc

Announcement ID: SUSE-SU-2026:20178-1  
Release Date: 2026-01-29T16:16:14Z  
Rating: important  
References:

  * bsc#1236282
  * bsc#1256436
  * bsc#1256766
  * bsc#1256822
  * bsc#1257005

Cross-References:

  * CVE-2025-0395
  * CVE-2025-15281
  * CVE-2026-0861
  * CVE-2026-0915

CVSS scores:

  * CVE-2025-0395 ( SUSE ):  2.0
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2025-0395 ( SUSE ):  3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
  * CVE-2025-0395 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-15281 ( SUSE ):  6.8
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-15281 ( SUSE ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2025-15281 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-0861 ( SUSE ):  8.5
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-0861 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-0861 ( NVD ):  8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-0915 ( SUSE ):  6.3
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-0915 ( SUSE ):  5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
  * CVE-2026-0915 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Products:

  * SUSE Linux Micro 6.2
  * SUSE Linux Micro Extras 6.2

An update that solves four vulnerabilities and has one fix can now be installed.

## Description:

This update for glibc fixes the following issues:

Security fixes:

  * CVE-2025-0395: Fixed buffer overflow in the assert() function (bsc#1236282).
  * CVE-2026-0861: Fixed inadequate size check in the memalign suite may result
    in an integer overflow (bsc#1256766).
  * CVE-2026-0915: Fixed uninitialized stack buffer used as DNS query name when
    net==0 in _nss_dns_getnetbyaddr_r (bsc#1256822).
  * CVE-2025-15281: Fixed uninitialized memory may cause the process abort
    (bsc#1257005).

Other fixes:

  * NPTL: Optimize trylock for high cache contention workloads (bsc#1256436)

## 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 6.2  
    zypper in -t patch SUSE-SL-Micro-6.2-218=1

  * SUSE Linux Micro Extras 6.2  
    zypper in -t patch SUSE-SL-Micro-6.2-218=1

## Package List:

  * SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
    * glibc-locale-base-2.40-160000.3.1
    * glibc-2.40-160000.3.1
    * glibc-debugsource-2.40-160000.3.1
    * glibc-debuginfo-2.40-160000.3.1
    * glibc-devel-2.40-160000.3.1
    * glibc-locale-2.40-160000.3.1
    * glibc-devel-debuginfo-2.40-160000.3.1
  * SUSE Linux Micro 6.2 (aarch64 x86_64)
    * glibc-gconv-modules-extra-debuginfo-2.40-160000.3.1
    * glibc-gconv-modules-extra-2.40-160000.3.1
  * SUSE Linux Micro Extras 6.2 (aarch64 ppc64le s390x x86_64)
    * glibc-gconv-modules-extra-debuginfo-2.40-160000.3.1
    * glibc-debuginfo-2.40-160000.3.1
    * glibc-gconv-modules-extra-2.40-160000.3.1
    * glibc-debugsource-2.40-160000.3.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-0395.html
  * https://www.suse.com/security/cve/CVE-2025-15281.html
  * https://www.suse.com/security/cve/CVE-2026-0861.html
  * https://www.suse.com/security/cve/CVE-2026-0915.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1236282
  * https://bugzilla.suse.com/show_bug.cgi?id=1256436
  * https://bugzilla.suse.com/show_bug.cgi?id=1256766
  * https://bugzilla.suse.com/show_bug.cgi?id=1256822
  * https://bugzilla.suse.com/show_bug.cgi?id=1257005

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