Security update for krb5

Announcement ID: SUSE-SU-2026:21629-1
Release Date: 2026-05-09T15:45:07Z
Rating: moderate
References:
Cross-References:
CVSS scores:
  • CVE-2026-40355 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2026-40355 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2026-40356 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2026-40356 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:
  • SUSE Linux Micro 6.1

An update that solves two vulnerabilities can now be installed.

Description:

This update for krb5 fixes the following issues

  • CVE-2026-40355: Denial of Service via NULL pointer dereference in NegoEx mechanism (bsc#1263366).
  • CVE-2026-40356: Denial of Service via integer underflow and out-of-bounds read (bsc#1263367).

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-6.1-522=1

Package List:

  • SUSE Linux Micro 6.1 (aarch64 ppc64le s390x x86_64)
    • krb5-debuginfo-1.21.3-slfo.1.1_4.1
    • krb5-1.21.3-slfo.1.1_4.1
    • krb5-client-debuginfo-1.21.3-slfo.1.1_4.1
    • krb5-client-1.21.3-slfo.1.1_4.1
    • krb5-debugsource-1.21.3-slfo.1.1_4.1

References: