USN-8585-1

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Source
https://ubuntu.com/security/notices/USN-8585-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8585-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-8585-1
Upstream
Related
Published
2026-07-22T13:04:35Z
Modified
2026-07-22T21:03:54.636364771Z
Summary
krb5 vulnerabilities
Details

It was discovered that Kerberos had an integer underflow vulnerability in the berval2tl_data() function. An attacker could possibly use this issue to cause Kerberos to crash, resulting in a denial of service. (CVE-2026-11850)

It was discovered that Kerberos had vulnerabilities in its NegoEx mechanism parsing. A remote attacker could possibly use these issues to cause Kerberos to crash, resulting in a denial of service. (CVE-2026-40355, CVE-2026-40356)

References

Affected packages

Ubuntu:22.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.19.2-2ubuntu0.8

Affected versions

1.*
1.18.3-6
1.18.3-7
1.19.2-0ubuntu1
1.19.2-1
1.19.2-2
1.19.2-2ubuntu0.1
1.19.2-2ubuntu0.2
1.19.2-2ubuntu0.3
1.19.2-2ubuntu0.4
1.19.2-2ubuntu0.5
1.19.2-2ubuntu0.6
1.19.2-2ubuntu0.7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-admin-server"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-gss-samples"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-k5tls"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-kdc"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-kdc-ldap"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-kpropd"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-locales"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-multidev"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-otp"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-pkinit"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "krb5-user"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "libgssapi-krb5-2"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "libgssrpc4"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "libk5crypto3"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "libkadm5clnt-mit12"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "libkadm5srv-mit12"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "libkdb5-10"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "libkrad0"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "libkrb5-3"
        },
        {
            "binary_version": "1.19.2-2ubuntu0.8",
            "binary_name": "libkrb5support0"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8585-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-11850"
        },
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-40355"
        },
        {
            "id": "CVE-2026-40356",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}

Ubuntu:24.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.20.1-6ubuntu2.7

Affected versions

1.*
1.20.1-3ubuntu1
1.20.1-5build1
1.20.1-6ubuntu1
1.20.1-6ubuntu2
1.20.1-6ubuntu2.1
1.20.1-6ubuntu2.2
1.20.1-6ubuntu2.3
1.20.1-6ubuntu2.4
1.20.1-6ubuntu2.5
1.20.1-6ubuntu2.6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-admin-server"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-gss-samples"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-k5tls"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-kdc"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-kdc-ldap"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-kpropd"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-locales"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-multidev"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-otp"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-pkinit"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "krb5-user"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "libgssapi-krb5-2"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "libgssrpc4t64"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "libk5crypto3"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "libkadm5clnt-mit12"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "libkadm5srv-mit12"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "libkdb5-10t64"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "libkrad0"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "libkrb5-3"
        },
        {
            "binary_version": "1.20.1-6ubuntu2.7",
            "binary_name": "libkrb5support0"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-11850",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-40355",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-40356",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8585-1.json"

Ubuntu:26.04:LTS / krb5

Package

Name
krb5
Purl
pkg:deb/ubuntu/krb5?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.22.1-2ubuntu4.1

Affected versions

1.*
1.21.3-5ubuntu2
1.22.1-2
1.22.1-2ubuntu2
1.22.1-2ubuntu3
1.22.1-2ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-admin-server"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-gss-samples"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-k5tls"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-kdc"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-kdc-ldap"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-kpropd"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-locales"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-multidev"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-otp"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-pkinit"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "krb5-user"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "libgssapi-krb5-2"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "libgssrpc4t64"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "libk5crypto3"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "libkadm5clnt-mit12"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "libkadm5srv-mit12"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "libkdb5-10t64"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "libkrad0"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "libkrb5-3"
        },
        {
            "binary_version": "1.22.1-2ubuntu4.1",
            "binary_name": "libkrb5support0"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:26.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-11850",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-40355"
        },
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-40356"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8585-1.json"