CVE-2009-0844

What it is

The get_input_token function in the SPNEGO implementation in MIT Kerberos 5 (aka krb5) 1.5 through 1.6.3 allows remote attackers to cause a denial of service (daemon crash) and possibly obtain sensitive information via a crafted length value that triggers a buffer over-read.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

4.3% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2009-04-09 00:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:05 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 4.3% in the next 30 days (EPSS).
• Severity: 5.8 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2009-04-09 00:30 UTC

Last modified

2026-06-16 23:05 UTC

Exploit probability

4.3% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Modified

Affected

• Mit Kerberos 5-1.6.3
• Mit Kerberos 5
• Mit Kerberos 5 1.5
• Mit Kerberos 5 1.5.1
• Mit Kerberos 5 1.5.2
• Mit Kerberos 5 1.5.3
• Mit Kerberos 5 1.6
• Mit Kerberos 5 1.6.1

Attack profile CVSS 2.0 · 5.8

Attack vector

Network

Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

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