GHSA-f7p3-6rhj-p7jv

GHSA-f7p3-6rhj-p7jv PUBLISHED CVSS 5.900000095367432 MEDIUM

In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of-bounds read 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, possibly causing the process to terminate in parse_message.

Risk Scores

CVSS 3.1

5.900000095367432

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Timeline

Apr 28, 2026 CVE Published
May 7, 2026 Security Advisory

References

https://nvd.nist.gov/vuln/detail/CVE-2026-40356 advisory
https://github.com/krb5/krb5/commit/2e75f0d9362fb979f5fc92829431a590a130929f url
https://cems.fun/2026/04/27/krb5-two-unauthenticated-network-vulnerabilities.html url
https://web.mit.edu/kerberos/advisories url

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