Krb5: mit krb5 kadmind unauthenticated memory leak dos via gss-rpc auth flavor switching
Historical advisory recorded 9 Nov 2026 21:02:10 UTC. Read the latest advisory.
cve-program · CVE-2026-112320
PublishedThe 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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cve-program · CVE-2026-112320
PublishedKrb5: mit krb5 kadmind unauthenticated memory leak dos via gss-rpc auth flavor switching
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.
- Source published
- 9 Nov 2026 19:08:07 UTC
- Source modified
- 9 Nov 2026 19:08:07 UTC
- Saved here
- 9 Nov 2026 21:02:10 UTC
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- CVE Program Terms of Use
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CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H