Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges
openSUSE Leap 16.0 krb5 Moderate Denial of Service Vuln 2026-21021-1
opensuse
June 30, 2026
An update that solves 2 vulnerabilities and has 2 bug fixes 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 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-16.0-1033=1
Topics Covered
Patch
Package List
- openSUSE Leap 16.0:
krb5-1.21.3-160000.3.1
krb5-client-1.21.3-160000.3.1
krb5-devel-1.21.3-160000.3.1
krb5-plugin-kdb-ldap-1.21.3-160000.3.1
krb5-plugin-preauth-otp-1.21.3-160000.3.1
krb5-plugin-preauth-pkinit-1.21.3-160000.3.1
krb5-plugin-preauth-spake-1.21.3-160000.3.1
krb5-server-1.21.3-160000.3.1
References
* bsc#1263366
* bsc#1263367
References:
* https://www.suse.com/security/cve/CVE-2026-40355.html
* https://www.suse.com/security/cve/CVE-2026-40356.html
PREVIOUS
NEXT
Severity
moderate
Lowest
Low
Medium
High
Critical
Announcement ID: openSUSE-SU-2026:21021-1
Rating: moderate
Affected Products:
openSUSE Leap 16.0
-------------------------------------------------------------
Topics Covered
Get the latest News and Insights
Get the latest Linux and open source security news straight to your inbox.
Powered By
Linux Security - Your source for Top Linux News, Advisories, HOWTOs and Feature Releases
QUICK LINKS
subscribe to newsletters!
Like staying secure? So do we.
Sign up for updates, tips, and alerts!