USN-8355-1

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Source
https://ubuntu.com/security/notices/USN-8355-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8355-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8355-1
Upstream
Related
Published
2026-06-01T14:05:32Z
Modified
2026-06-01T19:14:33Z
Summary
sssd vulnerability
Details

It was discovered that SSSD did not properly handle raw bytes in the PAM passkey responder. A local attacker could possibly use this issue to cause the SSSD PAM responder to crash, resulting in a denial of service.

References

Affected packages

Ubuntu:24.04:LTS / sssd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.9.4-1.1ubuntu6.5

Affected versions

2.*
2.9.1-2ubuntu2
2.9.1-2ubuntu3
2.9.2-1ubuntu2
2.9.4-1ubuntu1
2.9.4-1.1ubuntu3
2.9.4-1.1ubuntu5
2.9.4-1.1ubuntu6
2.9.4-1.1ubuntu6.1
2.9.4-1.1ubuntu6.2
2.9.4-1.1ubuntu6.3
2.9.4-1.1ubuntu6.4

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libipa-hbac0t64",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "libnss-sss",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "libpam-sss",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "libsss-certmap0",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "libsss-idmap0",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "libsss-nss-idmap0",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "libsss-sudo",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "python3-libipa-hbac",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "python3-libsss-nss-idmap",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "python3-sss",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-ad",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-ad-common",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-common",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-dbus",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-idp",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-ipa",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-kcm",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-krb5",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-krb5-common",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-ldap",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-passkey",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-proxy",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        },
        {
            "binary_name":  "sssd-tools",
            "binary_version":  "2.9.4-1.1ubuntu6.5"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-6245",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8355-1.json"

Ubuntu:25.10 / sssd

Package

Name
sssd
Purl
pkg:deb/ubuntu/sssd?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.10.1-2ubuntu5.2

Affected versions

2.*
2.10.1-2ubuntu4
2.10.1-2ubuntu5
2.10.1-2ubuntu5.1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libipa-hbac0t64",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "libnss-sss",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "libpam-sss",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "libsss-certmap0",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "libsss-idmap0",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "libsss-nss-idmap0",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "libsss-sudo",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "python3-libipa-hbac",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "python3-libsss-nss-idmap",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "python3-sss",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-ad",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-ad-common",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-common",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-dbus",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-idp",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-ipa",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-kcm",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-krb5",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-krb5-common",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-ldap",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-passkey",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-proxy",
            "binary_version":  "2.10.1-2ubuntu5.2"
        },
        {
            "binary_name":  "sssd-tools",
            "binary_version":  "2.10.1-2ubuntu5.2"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-6245",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:25.10"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8355-1.json"

Ubuntu:26.04:LTS / sssd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.12.0-1ubuntu5.1

Affected versions

2.*
2.10.1-2ubuntu5
2.10.1-2ubuntu7
2.12.0-1ubuntu3
2.12.0-1ubuntu4
2.12.0-1ubuntu5

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libipa-hbac0t64",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "libnss-sss",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "libpam-sss",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "libsss-certmap0",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "libsss-idmap0",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "libsss-nss-idmap0",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "libsss-sudo",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "python3-libipa-hbac",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "python3-libsss-nss-idmap",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "python3-sss",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-ad",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-ad-common",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-common",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-dbus",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-idp",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-ipa",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-kcm",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-krb5",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-krb5-common",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-ldap",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-passkey",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-proxy",
            "binary_version":  "2.12.0-1ubuntu5.1"
        },
        {
            "binary_name":  "sssd-tools",
            "binary_version":  "2.12.0-1ubuntu5.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-6245",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8355-1.json"