krb5: MIT Kerberos 5: Denial of Service via NULL pointer dereference in NegoEx mechanism

A flaw was found in MIT Kerberos 5 krb5. An unauthenticated remote attacker can exploit a NULL pointer dereference vulnerability by calling gssacceptseccontext on a system with a NegoEx mechanism registered. This can lead to the termination of the process, resulting in a Denial of Service DoS...

AlmaLinux 8 : krb5 (ALSA-2026:16799)

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:16799 advisory. krb5: MIT Kerberos 5 krb5: Denial of Service via integer underflow and out-of-bounds read CVE-2026-40356 krb5: MIT Kerberos 5: Denial of Service via NULL...

krb5 security update

1.18.2-34.0.1 - Fixed race condition in krb5setpassword Orabug: 33609767 1.18.2-34 - Fix NegoEx parsing vulnerabilities CVE-2026-40355, CVE-2026-40356 Resolves: RHEL-171589 RHEL-171594...

Important: krb5 security update

Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the...

SUSE-SU-2026:1816-1 Security update for krb5

This update for krb5 fixes the following issues - CVE-2026-40355: Denial of Service via NULL pointer dereference in NegoEx mechanism bsc1263366. - CVE-2026-40356: Denial of Service via integer underflow and out-of-bounds read bsc1263367...

SUSE-SU-2026:21618-1 Security update for krb5

This update for krb5 fixes the following issues - CVE-2026-40355: Denial of Service via NULL pointer dereference in NegoEx mechanism bsc1263366. - CVE-2026-40356: Denial of Service via integer underflow and out-of-bounds read bsc1263367...

OESA-2026-2257 krb5 security update

Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography. Security Fixes: In MIT Kerberos 5 aka krb5 before 1.22.3, there is a NULL pointer dereference if an application calls gssacceptseccontext...

CentOS 9 : krb5-1.21.1-10.el9

The remote CentOS Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the krb5-1.21.1-10.el9 build changelog. - 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...

Fedora 44 : krb5 (2026-8b43ea2f82)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-8b43ea2f82 advisory. Fix NegoEx parsing vulnerabilities CVE-2026-40355, CVE-2026-40356 Add upstream patches to build against openssl 4.0 Make configure.ac work with...

krb5: MIT Kerberos 5: Denial of Service via NULL pointer dereference in NegoEx mechanism

A flaw was found in MIT Kerberos 5 krb5. An unauthenticated remote attacker can exploit a NULL pointer dereference vulnerability by calling gssacceptseccontext on a system with a NegoEx mechanism registered. This can lead to the termination of the process, resulting in a Denial of Service DoS...

SUSE CVE-2026-40355

In MIT Kerberos 5 aka krb5 before 1.22.3, there is a NULL pointer dereference if an application calls gssacceptseccontext on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, causing the process to terminate in parsenegomessage...

SUSE CVE-2026-40356

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 gssacceptseccontext on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process t...

Fedora 45 : krb5 (2026-2e9fe57a46)

The remote Fedora 45 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2e9fe57a46 advisory. Automatic update for krb5-1.22.2-7.fc45. Changelog Tue Apr 28 2026 Julien Rische - 1.22.2-7 - Fix NegoEx parsing vulnerabilities CVE-2026-40355,...

Linux Distros Unpatched Vulnerability : CVE-2026-40355

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In MIT Kerberos 5 aka krb5 before 1.22.3, there is a NULL pointer dereference if an application calls gssacceptseccontext on a system with a NegoEx mechanism...

Linux Distros Unpatched Vulnerability : CVE-2026-40356

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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 gssacceptseccontext on a system...

CVE-2026-40355

A flaw was found in MIT Kerberos 5 krb5. An unauthenticated remote attacker can exploit a NULL pointer dereference vulnerability by calling gssacceptseccontext on a system with a NegoEx mechanism registered. This can lead to the termination of the process, resulting in a Denial of Service DoS...

CVE-2026-40356

A flaw was found in MIT Kerberos 5 krb5. An unauthenticated remote attacker can exploit an integer underflow and an out-of-bounds read vulnerability by calling gssacceptseccontext on a system with a NegoEx mechanism registered. This can lead to the process terminating, resulting in a Denial of...

CVE-2026-40356

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 gssacceptseccontext on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process t...

DEBIAN-CVE-2026-40356

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 gssacceptseccontext on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process t...

AZL-85238 CVE-2026-40356 affecting package krb5 for versions less than 1.21.3-4

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 gssacceptseccontext on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process t...