Vulnerability/
REDHAT-BUG-2463368

REDHAT-BUG-2463368

Q: What is the severity of REDHAT-BUG-2463368?

The severity of REDHAT-BUG-2463368 is considered critical due to potential remote exploitation that can lead to denial of service.

Q: How do I fix REDHAT-BUG-2463368?

To fix REDHAT-BUG-2463368, upgrade MIT Kerberos 5 (krb5) to version 1.22.3 or later.

Q: Who is affected by REDHAT-BUG-2463368?

Users running MIT Kerberos 5 (krb5) versions prior to 1.22.3 are affected by REDHAT-BUG-2463368.

Q: What causes the vulnerability in REDHAT-BUG-2463368?

REDHAT-BUG-2463368 is caused by an integer underflow and out-of-bounds read when gss_accept_sec_context() is called with a NegoEx mechanism.

Q: Can REDHAT-BUG-2463368 be exploited remotely?

Yes, REDHAT-BUG-2463368 can be exploited by unauthenticated remote attackers, which poses a significant security risk.

Published Apr 28, 2026

Updated

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.

Affected Software

1 affected component

MIT Kerberos 5 (krb5)<1.22.3

Event History

Apr 28, 2026

Data Sourced

via Red Hat·07:02 AM

DescriptionSeverityAffected Software

Frequently Asked Questions

What is the severity of REDHAT-BUG-2463368?

The severity of REDHAT-BUG-2463368 is considered critical due to potential remote exploitation that can lead to denial of service.

How do I fix REDHAT-BUG-2463368?

To fix REDHAT-BUG-2463368, upgrade MIT Kerberos 5 (krb5) to version 1.22.3 or later.

Who is affected by REDHAT-BUG-2463368?

Users running MIT Kerberos 5 (krb5) versions prior to 1.22.3 are affected by REDHAT-BUG-2463368.

What causes the vulnerability in REDHAT-BUG-2463368?

REDHAT-BUG-2463368 is caused by an integer underflow and out-of-bounds read when gss_accept_sec_context() is called with a NegoEx mechanism.

Can REDHAT-BUG-2463368 be exploited remotely?

Yes, REDHAT-BUG-2463368 can be exploited by unauthenticated remote attackers, which poses a significant security risk.

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