openSUSE-SU-2026:21228-1: moderate: Security update for glibc

openSUSE security update: security update for glibc
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:21228-1
Rating: moderate
References:

  * bsc#1263656
  * bsc#1263658



Cross-References:

  * CVE-2026-5435
  * CVE-2026-6238



CVSS scores:

  * CVE-2026-5435 ( SUSE ): 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
  * CVE-2026-5435 ( SUSE ): 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-6238 ( SUSE ): 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
  * CVE-2026-6238 ( SUSE ): 4.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 2 vulnerabilities and has 2 bug fixes can now be installed.

Description:

This update for glibc fixes the following issues

- CVE-2026-5435: unchecked buffer writing in TSIG handling can lead to an out-of-bounds write (bsc#1263656).
- CVE-2026-6238: insufficient RDATA length validation can lead to application crashes or uninitialized memory disclosure
  (bsc#1263658).


Patch instructions:

   To install this openSUSE security 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 16.0

   zypper in -t patch openSUSE-Leap-16.0-1157=1

Package List:

- openSUSE Leap 16.0:

  cross-aarch64-glibc-devel-2.40-160000.6.1
  cross-ppc64le-glibc-devel-2.40-160000.6.1
  cross-riscv64-glibc-devel-2.40-160000.6.1
  cross-s390x-glibc-devel-2.40-160000.6.1
  glibc-2.40-160000.6.1
  glibc-devel-2.40-160000.6.1
  glibc-devel-static-2.40-160000.6.1
  glibc-extra-2.40-160000.6.1
  glibc-gconv-modules-extra-2.40-160000.6.1
  glibc-html-2.40-160000.6.1
  glibc-i18ndata-2.40-160000.6.1
  glibc-info-2.40-160000.6.1
  glibc-lang-2.40-160000.6.1
  glibc-locale-2.40-160000.6.1
  glibc-locale-base-2.40-160000.6.1
  glibc-profile-2.40-160000.6.1
  glibc-utils-2.40-160000.6.1

References:

  * https://www.suse.com/security/cve/CVE-2026-5435.html
  * https://www.suse.com/security/cve/CVE-2026-6238.html