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CVE-2026-112321

Krb5: mit krb5 kadmind unauthenticated memory leak dos via auth_gssapi_init error paths

CVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-112321

Published

The AUTH_GSSAPI handler in lib/rpc/svc_auth_gssapi.c in MIT Kerberos 5 (aka krb5) does not free decoded arguments on certain error paths, which allows remote attackers to cause a denial of service (memory exhaustion in kadmind) via crafted AUTH_GSSAPI_INIT requests that trigger authentication failures.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-112321

Published

krb5

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "krb5",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.21.3-11.el10_3.2",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:10.3"
                    ]
                }

krb5

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10.2 Extended Update Support",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "krb5",
                    "defaultStatus": "affected",
                    "versions": [
                        {
                            "version": "0:1.21.3-10.el10_2.2",
                            "lessThan": "*",
                            "versionType": "rpm",
                            "status": "unaffected"
                        }
                    ],
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux_eus:10.2"
                    ]
                }

krb5

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 6",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "krb5",
                    "defaultStatus": "unknown",
                    "cpes": [
                        "cpe:/o:redhat:rhel_els:6"
                    ]
                }

krb5

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 7",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "krb5",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/o:redhat:rhel_els:7"
                    ]
                }

krb5

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "krb5",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:8"
                    ]
                }

krb5

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "krb5",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9"
                    ]
                }

krb5

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Hardened Images",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "krb5",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:hummingbird:1"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON