Linux · 
Debian · Security advisory · May 27, 2026
Debian · Security advisory · May 27, 2026DEBIAN-CVE-2026-40355: krb5 security update
DEBIAN-CVE-2026-40355, released May 27, 2026, fixes 1 CVE in krb5. None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
1
None rated Critical
Exploited
0
None reported
Highest CVSS
7.5
Base score, 0 to 10
Highest EPSS
0.0065
51st percentile
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| krb5 | Debian 12.15 (bookworm) | 1.20.1-2+deb12u5 |
| krb5 | Debian 13.5 (trixie) | 1.21.3-5+deb13u1 |
| krb5 | Debian 14 | 1.22.1-2.1 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2026-40355 | krb5-admin-server: In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application calls gss_accept_se... | 7.5 | 0.0065 | None reported |
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