JLSEC-2026-1258 High 7.5
In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application...
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.
References
- https://cems.fun/2026/04/27/krb5-two-unauthenticated-network-vulnerabilities.html
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://github.com/advisories/GHSA-8qgv-wm66-hrmc
- https://github.com/krb5/krb5/commit/2e75f0d9362fb979f5fc92829431a590a130929f
- https://nvd.nist.gov/vuln/detail/CVE-2026-40355
- https://web.mit.edu/kerberos/advisories
- https://web.mit.edu/kerberos/advisories/