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SUSE 16.0 krb5 Moderate Denial of Service Vuln 2026-22322-1

suse
Calendar Grey July 1, 2026
Dist Suse Esm H88
Two vulnerabilities in krb5 lead to potential denial of service. Update for SUSE systems is now available for mitigation.
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 Enterprise Server 16.0 zypper in -t patch SUSE-SLES-16.0-1033=1 * SUSE Linux Enterprise Server for SAP applications 16.0 zypper in -t patch SUSE-SLES-16.0-1033=1 ## Package List: * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64) * krb5-client-1.21.3-160000.3.1 * krb5-plugin-preauth-spake-1.21.3-160000.3.1

Topics%20covered

Topics Covered

security advisory moderate denial of service update SuSE krb5

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 Enterprise Server 16.0

* SUSE Linux Enterprise Server for SAP applications 16.0

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

Severity
moderate
Lowest
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Critical

Announcement ID: SUSE-SU-2026:22322-1
Release Date: 2026-06-22T14:30:37Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate denial of service update SuSE krb5

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