CVE-2026-40356

CVSS 5.9 MEDIUMEPSS 0.5%CWE-191

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.

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

Produtos afetados

MIT · Kerberos 5

Quer saber se a sua infraestrutura está exposta a isto?

Falar com a TrueHacking →

Referências

https://cems.fun/2026/04/27/krb5-two-unauthenticated-network-vulnerabilities.html https://github.com/krb5/krb5/commit/2e75f0d9362fb979f5fc92829431a590a130929f https://web.mit.edu/kerberos/advisories/