CVE-2026-112320

Krb5: mit krb5 kadmind unauthenticated memory leak dos via gss-rpc auth flavor switching

CVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-112320

Published

The GSS-RPC transport layer in MIT Kerberos 5 (aka krb5) 1.4 and later does not release the previous authentication context when a client switches from an RPCSEC_GSS or AUTH_GSSAPI flavor to a non-GSS flavor on the same TCP connection. This allows remote attackers to cause a denial of service (memory exhaustion in kadmind) by repeatedly establishing and abandoning GSS authentication contexts.

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Affected versions, risk and source history

Exploitation and risk

Source status

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Risk history

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Advisory history

4 saved versions

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12 Nov 2026 20:16:18 UTC