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CVE-2026-119079

Krb5: mit krb5 kdc unauthenticated cpu dos via quadratic asn.1 sequence of decoding

CVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

Historical advisory recorded 12 Nov 2026 18:16:18 UTC. Read the latest advisory.

cve-program · CVE-2026-119079

Published

decode_sequence_of() in lib/krb5/asn.1/asn1_encode.c in MIT Kerberos 5 (aka krb5) 1.11 and later grows the decoded element array one entry at a time, which allows remote attackers to cause a denial of service (CPU consumption in the KDC) by sending an unauthenticated AS-REQ or TGS-REQ with a large number of elements in a SEQUENCE OF field over TCP.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-119079

Published

Krb5: mit krb5 kdc unauthenticated cpu dos via quadratic asn.1 sequence of decoding

decode_sequence_of() in lib/krb5/asn.1/asn1_encode.c in MIT Kerberos 5 (aka krb5) 1.11 and later grows the decoded element array one entry at a time, which allows remote attackers to cause a denial of service (CPU consumption in the KDC) by sending an unauthenticated AS-REQ or TGS-REQ with a large number of elements in a SEQUENCE OF field over TCP.

Source published
9 Nov 2026 18:43:39 UTC
Source modified
12 Nov 2026 16:48:13 UTC
Saved here
12 Nov 2026 18:16:18 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

ChangeIntel

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Sources read 12 Nov 19:39 UTC · 274 of 275 readable · 272 fully read · documentation 464/469 current

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