VDB
CVE-2026-40355
CVE-2026-40355
PUBLISHED
CVSS 5.9 MEDIUM
Reported by mitre · Published April 28, 2026
In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, causing the process to terminate in parse_nego_message.
EPSS 0.11% · 28.7th percentile
Risk Scores
CVSS 3.1
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.11%
28.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| MIT | Kerberos 5 | 1.18 |
| MIT | Kerberos 5 | 1.18 |
| mit | kerberos_5 | 1.18 |
Timeline
- CVE Published
- Apr 27, 2026 PoC Published
- May 13, 2026 Distribution Patch
- May 13, 2026 Security Advisory
- May 13, 2026 Security Advisory
- May 15, 2026 Distribution Patch
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 20, 2026 Distribution Patch
- May 20, 2026 Security Advisory
- May 21, 2026 EPSS Score