SUSE Linux Micro 6.1 krb5 Moderate Denial of Service Advisory 2026-21629-1
suse
May 15, 2026
An update that solves two vulnerabilities can now be installed.
Summary
## 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
* bsc#1263366
* bsc#1263367
Cross-
* CVE-2026-40355
* CVE-2026-40356
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.
##
* https://www.suse.com/security/cve/CVE-2026-40355.html
* https://www.suse.com/security/cve/CVE-2026-40356.html
* https://bugzilla.suse.com/show_bug.cgi?id=1263366
* https://bugzilla.suse.com/show_bug.cgi?id=1263367
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