Debian alert DSA-6293-1 (krb5)

From:
             
 
Salvatore Bonaccorso <carnil@debian.org>
To:
             
 
debian-security-announce@lists.debian.org
Subject:
             
 
[SECURITY] [DSA 6293-1] krb5 security update
Date:
             
 
Fri, 22 May 2026 21:32:08 +0000
Message-ID:
             
 
<E1wQXTU-000000083zl-3n6P@seger.debian.org>
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Debian Security Advisory DSA-6293-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
May 22, 2026                          https://www.debian.org/security/faq
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Package        : krb5
CVE ID         : CVE-2026-40355
Debian Bug     : 1135317

Cem Onat Karagun discovered two vulnerabilities in the NegoEx parsing in
krb5, the MIT implementation of Kerberos. An unauthenticated remote
attacker can take advantage of these flaws to cause a denial of service.

For the oldstable distribution (bookworm), this problem has been fixed
in version 1.20.1-2+deb12u5.

For the stable distribution (trixie), this problem has been fixed in
version 1.21.3-5+deb13u1.

We recommend that you upgrade your krb5 packages.

For the detailed security status of krb5 please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/krb5

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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