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In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference 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, causing the process to terminate in parse_nego_message.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade krb5-libsUpgrade krb5-server-ldapUpgrade krb5-xrealmauthzUpgrade krb5-serverUpgrade krb5-workstationUpgrade krb5-pkinitUpgrade libkadm5Upgrade krb5-devel | May 13, 2026 | May 13, 2026 |
| Amazon_linux_2023 | — | Upgrade krb5-debuginfoUpgrade krb5-server-ldapUpgrade krb5-debugsourceUpgrade krb5-server-ldap-debuginfoUpgrade krb5-workstation-debuginfoUpgrade krb5-pkinit-debuginfoUpgrade krb5-libsUpgrade libkadm5-debuginfoUpgrade krb5-workstationUpgrade krb5-pkinitUpgrade krb5-libs-debuginfoUpgrade krb5-server-debuginfoUpgrade krb5-serverUpgrade libkadm5Upgrade krb5-devel | May 19, 2026 | Apr 28, 2026 |
| Debian | — | Upgrade krb5 | May 24, 2026 | May 24, 2026 |
| Nutanix Ahv | — | Upgrade Nutanix AHV to the latest version | Jul 2, 2026 | Jun 30, 2026 |
| Oracle_linux | — | Upgrade krb5-server-ldapUpgrade krb5-xrealmauthzUpgrade krb5-libsUpgrade krb5-serverUpgrade libkadm5Upgrade krb5-workstationUpgrade krb5-pkinitUpgrade krb5-devel | May 21, 2026 | Apr 28, 2026 |
| Redhat_linux | — | No solution existsUpgrade krb5-pkinit-debuginfoUpgrade krb5-devel-debuginfoUpgrade krb5-libsUpgrade krb5-xrealmauthz-debuginfoUpgrade krb5-server-debuginfoUpgrade krb5-libs-debuginfoUpgrade krb5-server-ldap-debuginfoUpgrade krb5-workstationUpgrade krb5-xrealmauthzUpgrade krb5-debugsourceUpgrade krb5-pkinitUpgrade krb5-server-ldapUpgrade krb5-serverUpgrade krb5-debuginfoUpgrade libkadm5Upgrade libkadm5-debuginfoUpgrade krb5-develUpgrade krb5-workstation-debuginfo | May 13, 2026 | Apr 28, 2026 |
| Rocky_linux | — | Upgrade krb5-server-debuginfoUpgrade libkadm5Upgrade krb5-libs-debuginfoUpgrade krb5-develUpgrade libkadm5-debuginfoUpgrade krb5-xrealmauthzUpgrade krb5-serverUpgrade krb5-libsUpgrade krb5-pkinitUpgrade krb5-workstationUpgrade krb5-debugsourceUpgrade krb5-devel-debuginfoUpgrade krb5-server-ldapUpgrade krb5-debuginfoUpgrade krb5-workstation-debuginfoUpgrade krb5-pkinit-debuginfoUpgrade krb5-server-ldap-debuginfoUpgrade krb5-xrealmauthz-debuginfo | May 18, 2026 | May 14, 2026 |
| Ubuntu | — | Upgrade libkrb5-3Upgrade krb5-kdcUpgrade krb5-admin-server | Jul 22, 2026 | Apr 28, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 21, 2026 | Apr 28, 2026 |
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