USN-8996-1

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Source
https://ubuntu.com/security/notices/USN-8996-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8996-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8996-1
Upstream
Related
Published
2026-11-04T13:37:00Z
Modified
2026-11-05T11:58:19Z
Summary
apt vulnerability
Details

Max Justicz discovered that APT incorrectly handled hard links when encountering redirects and retrying package downloads. A remote on-path attacker could possibly use this issue to trick APT into installing an unverified package and achieve remote code execution with root privileges.

References

Affected packages

Ubuntu:22.04:LTS
apt

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.4.15ubuntu0.1

Affected versions

2.*
2.3.9
2.3.11
2.3.12
2.3.13
2.3.14
2.3.15
2.3.15build1
2.4.1
2.4.3
2.4.5
2.4.6
2.4.7
2.4.8
2.4.9
2.4.10
2.4.11
2.4.12
2.4.13
2.4.14

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "apt",
            "binary_version": "2.4.15ubuntu0.1"
        },
        {
            "binary_name": "apt-transport-https",
            "binary_version": "2.4.15ubuntu0.1"
        },
        {
            "binary_name": "apt-utils",
            "binary_version": "2.4.15ubuntu0.1"
        },
        {
            "binary_name": "libapt-pkg6.0",
            "binary_version": "2.4.15ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-109518",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8996-1.json"
Ubuntu:24.04:LTS
apt

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.8.4ubuntu0.1

Affected versions

2.*
2.7.3
2.7.6
2.7.10
2.7.11
2.7.12
2.7.14
2.7.14build2
2.8.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "apt",
            "binary_version": "2.8.4ubuntu0.1"
        },
        {
            "binary_name": "apt-transport-https",
            "binary_version": "2.8.4ubuntu0.1"
        },
        {
            "binary_name": "apt-utils",
            "binary_version": "2.8.4ubuntu0.1"
        },
        {
            "binary_name": "libapt-pkg6.0t64",
            "binary_version": "2.8.4ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-109518",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8996-1.json"
Ubuntu:26.04:LTS
apt

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.2.1ubuntu0.1

Affected versions

3.*
3.1.6ubuntu2
3.1.8ubuntu1
3.1.11
3.1.12
3.1.13
3.1.14
3.1.15
3.1.16
3.2.0

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "apt",
            "binary_version": "3.2.1ubuntu0.1"
        },
        {
            "binary_name": "apt-transport-https",
            "binary_version": "3.2.1ubuntu0.1"
        },
        {
            "binary_name": "apt-utils",
            "binary_version": "3.2.1ubuntu0.1"
        },
        {
            "binary_name": "libapt-pkg7.0",
            "binary_version": "3.2.1ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-109518",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8996-1.json"
Ubuntu:26.10
apt

Package

Name
apt
Purl
pkg:deb/ubuntu/apt?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.3.3ubuntu0.1

Affected versions

3.*
3.2.0
3.3.2
3.3.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "apt",
            "binary_version": "3.3.3ubuntu0.1"
        },
        {
            "binary_name": "apt-transport-https",
            "binary_version": "3.3.3ubuntu0.1"
        },
        {
            "binary_name": "apt-utils",
            "binary_version": "3.3.3ubuntu0.1"
        },
        {
            "binary_name": "libapt-pkg7.0",
            "binary_version": "3.3.3ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-109518",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:26.10"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8996-1.json"
Ubuntu:Pro:14.04:LTS
apt

Package

Name
apt
Purl
pkg:deb/ubuntu/apt?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.0.1ubuntu2.24+esm4

Affected versions

0.*
0.9.9.1~ubuntu3
0.9.9.1~ubuntu4
0.9.9.1~ubuntu5
0.9.13~exp1ubuntu1
0.9.13~exp1ubuntu2
0.9.13~exp1ubuntu3
0.9.13.1~ubuntu1
0.9.14.1ubuntu1
0.9.14.1ubuntu2
0.9.15.1ubuntu1
0.9.15.4ubuntu1
0.9.15.4ubuntu2
0.9.15.4ubuntu3
0.9.15.4ubuntu4
0.9.15.4ubuntu5
1.*
1.0.1ubuntu2
1.0.1ubuntu2.1
1.0.1ubuntu2.3
1.0.1ubuntu2.4.1
1.0.1ubuntu2.5
1.0.1ubuntu2.6
1.0.1ubuntu2.7
1.0.1ubuntu2.8
1.0.1ubuntu2.9
1.0.1ubuntu2.10
1.0.1ubuntu2.11
1.0.1ubuntu2.12
1.0.1ubuntu2.13
1.0.1ubuntu2.14
1.0.1ubuntu2.15
1.0.1ubuntu2.17
1.0.1ubuntu2.18
1.0.1ubuntu2.19
1.0.1ubuntu2.20
1.0.1ubuntu2.22
1.0.1ubuntu2.23
1.0.1ubuntu2.24
1.0.1ubuntu2.24+esm1
1.0.1ubuntu2.24+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "apt",
            "binary_version": "1.0.1ubuntu2.24+esm4"
        },
        {
            "binary_name": "apt-transport-https",
            "binary_version": "1.0.1ubuntu2.24+esm4"
        },
        {
            "binary_name": "apt-utils",
            "binary_version": "1.0.1ubuntu2.24+esm4"
        },
        {
            "binary_name": "libapt-inst1.5",
            "binary_version": "1.0.1ubuntu2.24+esm4"
        },
        {
            "binary_name": "libapt-pkg4.12",
            "binary_version": "1.0.1ubuntu2.24+esm4"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-109518",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:14.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8996-1.json"
Ubuntu:Pro:16.04:LTS
apt

Package

Name
apt
Purl
pkg:deb/ubuntu/apt?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.2.36+esm1

Affected versions

1.*
1.0.10.2ubuntu1
1.1.4
1.1.5
1.1.10
1.2.3
1.2.4
1.2.6
1.2.7
1.2.8
1.2.9
1.2.10
1.2.10ubuntu1
1.2.12~ubuntu16.04.1
1.2.15
1.2.15ubuntu0.2
1.2.18
1.2.19
1.2.20
1.2.24
1.2.25
1.2.26
1.2.27
1.2.29
1.2.29ubuntu0.1
1.2.31
1.2.32
1.2.32ubuntu0.1
1.2.32ubuntu0.2
1.2.35

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "apt",
            "binary_version": "1.2.36+esm1"
        },
        {
            "binary_name": "apt-transport-https",
            "binary_version": "1.2.36+esm1"
        },
        {
            "binary_name": "apt-utils",
            "binary_version": "1.2.36+esm1"
        },
        {
            "binary_name": "libapt-inst2.0",
            "binary_version": "1.2.36+esm1"
        },
        {
            "binary_name": "libapt-pkg5.0",
            "binary_version": "1.2.36+esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-109518",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:16.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8996-1.json"
Ubuntu:Pro:18.04:LTS
apt

Package

Name
apt
Purl
pkg:deb/ubuntu/apt?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.6.19+esm1

Affected versions

1.*
1.5
1.5.1
1.6~alpha5
1.6~alpha7ubuntu1
1.6~alpha7ubuntu2
1.6~beta1
1.6~rc1
1.6
1.6.1
1.6.2
1.6.3
1.6.3ubuntu0.1
1.6.6
1.6.6ubuntu0.1
1.6.8
1.6.10
1.6.11
1.6.12
1.6.12ubuntu0.1
1.6.12ubuntu0.2
1.6.13
1.6.14
1.6.17
1.6.18~esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "apt",
            "binary_version": "1.6.19+esm1"
        },
        {
            "binary_name": "apt-transport-https",
            "binary_version": "1.6.19+esm1"
        },
        {
            "binary_name": "apt-utils",
            "binary_version": "1.6.19+esm1"
        },
        {
            "binary_name": "libapt-inst2.0",
            "binary_version": "1.6.19+esm1"
        },
        {
            "binary_name": "libapt-pkg5.0",
            "binary_version": "1.6.19+esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-109518",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:18.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8996-1.json"
Ubuntu:Pro:20.04:LTS
apt

Package

Name
apt
Purl
pkg:deb/ubuntu/apt?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.0.12+esm1

Affected versions

1.*
1.9.4
1.9.5
1.9.7
1.9.8
1.9.9
1.9.10
2.*
2.0.0
2.0.1
2.0.1ubuntu1
2.0.2
2.0.2ubuntu0.1
2.0.2ubuntu0.2
2.0.4
2.0.5
2.0.6
2.0.8
2.0.9
2.0.10
2.0.11

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "apt",
            "binary_version": "2.0.12+esm1"
        },
        {
            "binary_name": "apt-transport-https",
            "binary_version": "2.0.12+esm1"
        },
        {
            "binary_name": "apt-utils",
            "binary_version": "2.0.12+esm1"
        },
        {
            "binary_name": "libapt-pkg6.0",
            "binary_version": "2.0.12+esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-109518",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "high",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8996-1.json"