UBUNTU-CVE-2026-68744

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Source
https://ubuntu.com/security/CVE-2026-68744
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-68744.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-68744
Upstream
  • CVE-2026-68744
Published
2026-08-04T06:16:00Z
Modified
2026-08-06T00:23:23Z
Severity
  • 3.3 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in SSSD. The sssnssprotocolfillinitgr() function in the NSS responder pre-allocates reply space for all group entries but does not shrink the packet when groups are skipped, causing uninitialized heap bytes to be transmitted to the client. A local attacker can exploit this to disclose cached directory data and heap layout information from the sssd_nss process.

References

Affected packages

Ubuntu:16.04:LTS
sssd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.12.5-2
1.13.1-2
1.13.2-1
1.13.3-1
1.13.4-1
1.13.4-1ubuntu1
1.13.4-1ubuntu1.1
1.13.4-1ubuntu1.2
1.13.4-1ubuntu1.5
1.13.4-1ubuntu1.6
1.13.4-1ubuntu1.7
1.13.4-1ubuntu1.8
1.13.4-1ubuntu1.9
1.13.4-1ubuntu1.10
1.13.4-1ubuntu1.11
1.13.4-1ubuntu1.12
1.13.4-1ubuntu1.13
1.13.4-1ubuntu1.14
1.13.4-1ubuntu1.15

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libipa-hbac0",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "libnss-sss",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "libpam-sss",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "libsss-idmap0",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "libsss-nss-idmap0",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "libsss-simpleifp0",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "libsss-sudo",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "libwbclient-sssd",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "python-libipa-hbac",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "python-libsss-nss-idmap",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "python-sss",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "python3-libipa-hbac",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "python3-libsss-nss-idmap",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "python3-sss",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd-ad",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd-ad-common",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd-common",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd-dbus",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd-ipa",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd-krb5",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd-krb5-common",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd-ldap",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd-proxy",
            "binary_version": "1.13.4-1ubuntu1.15"
        },
        {
            "binary_name": "sssd-tools",
            "binary_version": "1.13.4-1ubuntu1.15"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-68744.json"
Ubuntu:18.04:LTS
sssd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.15.3-2ubuntu1
1.15.3-3ubuntu1
1.16.0-5ubuntu1
1.16.0-5ubuntu2
1.16.1-1ubuntu1
1.16.1-1ubuntu1.1
1.16.1-1ubuntu1.2
1.16.1-1ubuntu1.3
1.16.1-1ubuntu1.4
1.16.1-1ubuntu1.5
1.16.1-1ubuntu1.6
1.16.1-1ubuntu1.7
1.16.1-1ubuntu1.8

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libipa-hbac0",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "libnss-sss",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "libpam-sss",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "libsss-certmap0",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "libsss-idmap0",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "libsss-nss-idmap0",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "libsss-simpleifp0",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "libsss-sudo",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "libwbclient-sssd",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "python-libipa-hbac",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "python-libsss-nss-idmap",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "python-sss",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "python3-libipa-hbac",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "python3-libsss-nss-idmap",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "python3-sss",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-ad",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-ad-common",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-common",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-dbus",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-ipa",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-kcm",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-krb5",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-krb5-common",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-ldap",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-proxy",
            "binary_version": "1.16.1-1ubuntu1.8"
        },
        {
            "binary_name": "sssd-tools",
            "binary_version": "1.16.1-1ubuntu1.8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-68744.json"
Ubuntu:20.04:LTS
sssd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.2.0-4ubuntu1
2.2.2-1
2.2.2-1ubuntu1
2.2.3-1.1ubuntu1
2.2.3-2
2.2.3-3
2.2.3-3ubuntu0.1
2.2.3-3ubuntu0.2
2.2.3-3ubuntu0.3
2.2.3-3ubuntu0.4
2.2.3-3ubuntu0.6
2.2.3-3ubuntu0.7
2.2.3-3ubuntu0.8
2.2.3-3ubuntu0.9
2.2.3-3ubuntu0.10
2.2.3-3ubuntu0.11
2.2.3-3ubuntu0.12
2.2.3-3ubuntu0.13

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libipa-hbac0",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "libnss-sss",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "libpam-sss",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "libsss-certmap0",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "libsss-idmap0",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "libsss-nss-idmap0",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "libsss-simpleifp0",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "libsss-sudo",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "libwbclient-sssd",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "python3-libipa-hbac",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "python3-libsss-nss-idmap",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "python3-sss",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-ad",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-ad-common",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-common",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-dbus",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-ipa",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-kcm",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-krb5",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-krb5-common",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-ldap",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-proxy",
            "binary_version": "2.2.3-3ubuntu0.13"
        },
        {
            "binary_name": "sssd-tools",
            "binary_version": "2.2.3-3ubuntu0.13"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-68744.json"
Ubuntu:22.04:LTS
sssd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.4.1-2ubuntu4
2.5.2-4ubuntu1
2.5.2-4ubuntu3
2.5.2-4ubuntu4
2.6.1-1ubuntu3
2.6.3-1ubuntu3
2.6.3-1ubuntu3.1
2.6.3-1ubuntu3.2
2.6.3-1ubuntu3.3
2.6.3-1ubuntu3.4
2.6.3-1ubuntu3.5
2.6.3-1ubuntu3.6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libipa-hbac0",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "libnss-sss",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "libpam-sss",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "libsss-certmap0",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "libsss-idmap0",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "libsss-nss-idmap0",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "libsss-simpleifp0",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "libsss-sudo",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "python3-libipa-hbac",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "python3-libsss-nss-idmap",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "python3-sss",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-ad",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-ad-common",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-common",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-dbus",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-ipa",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-kcm",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-krb5",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-krb5-common",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-ldap",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-proxy",
            "binary_version": "2.6.3-1ubuntu3.6"
        },
        {
            "binary_name": "sssd-tools",
            "binary_version": "2.6.3-1ubuntu3.6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-68744.json"
Ubuntu:24.04:LTS
sssd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

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
2.9.4-1.1ubuntu6.5
2.9.4-1.1ubuntu6.6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libipa-hbac0t64",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "libnss-sss",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "libpam-sss",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "libsss-certmap0",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "libsss-idmap0",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "libsss-nss-idmap0",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "libsss-sudo",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "python3-libipa-hbac",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "python3-libsss-nss-idmap",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "python3-sss",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-ad",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-ad-common",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-common",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-dbus",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-idp",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-ipa",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-kcm",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-krb5",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-krb5-common",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-ldap",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-passkey",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-proxy",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        },
        {
            "binary_name": "sssd-tools",
            "binary_version": "2.9.4-1.1ubuntu6.6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-68744.json"
Ubuntu:26.04:LTS
sssd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libipa-hbac0t64",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "libnss-sss",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "libpam-sss",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "libsss-certmap0",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "libsss-idmap0",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "libsss-nss-idmap0",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "libsss-sudo",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "python3-libipa-hbac",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "python3-libsss-nss-idmap",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "python3-sss",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-ad",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-ad-common",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-common",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-dbus",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-idp",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-ipa",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-kcm",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-krb5",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-krb5-common",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-ldap",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-passkey",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-proxy",
            "binary_version": "2.12.0-1ubuntu5.2"
        },
        {
            "binary_name": "sssd-tools",
            "binary_version": "2.12.0-1ubuntu5.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-68744.json"