UBUNTU-CVE-2026-109976

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Source
https://ubuntu.com/security/CVE-2026-109976
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109976.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-109976
Upstream
  • CVE-2026-109976
Published
2026-10-13T13:17:00Z
Modified
2026-10-17T12:59:51Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon crashes when an AF_UNIX client connects to the data socket without a bound address, due to an integer underflow in the getpeername result handling. This causes a denial of service, preventing LUKS disk decryption from completing during boot.

References

Affected packages

Ubuntu:18.04:LTS
clevis

Package

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

Affected ranges

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

Affected versions

Other
8-1
8-1ubuntu0.*
8-1ubuntu0.1
8-1ubuntu0.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "clevis",
            "binary_version":  "8-1ubuntu0.2"
        },
        {
            "binary_name":  "clevis-dracut",
            "binary_version":  "8-1ubuntu0.2"
        },
        {
            "binary_name":  "clevis-initramfs",
            "binary_version":  "8-1ubuntu0.2"
        },
        {
            "binary_name":  "clevis-luks",
            "binary_version":  "8-1ubuntu0.2"
        },
        {
            "binary_name":  "clevis-systemd",
            "binary_version":  "8-1ubuntu0.2"
        },
        {
            "binary_name":  "clevis-udisks2",
            "binary_version":  "8-1ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109976.json"
Ubuntu:20.04:LTS
clevis

Package

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

Affected ranges

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

Affected versions

Other
11-2
12-1ubuntu1
12-1ubuntu2
12-1ubuntu2.*
12-1ubuntu2.1
12-1ubuntu2.2
12-1ubuntu2.3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "clevis",
            "binary_version":  "12-1ubuntu2.3"
        },
        {
            "binary_name":  "clevis-dracut",
            "binary_version":  "12-1ubuntu2.3"
        },
        {
            "binary_name":  "clevis-initramfs",
            "binary_version":  "12-1ubuntu2.3"
        },
        {
            "binary_name":  "clevis-luks",
            "binary_version":  "12-1ubuntu2.3"
        },
        {
            "binary_name":  "clevis-systemd",
            "binary_version":  "12-1ubuntu2.3"
        },
        {
            "binary_name":  "clevis-tpm2",
            "binary_version":  "12-1ubuntu2.3"
        },
        {
            "binary_name":  "clevis-udisks2",
            "binary_version":  "12-1ubuntu2.3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109976.json"
Ubuntu:22.04:LTS
clevis

Package

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

Affected ranges

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

Affected versions

Other
16-2
18-1
18-1ubuntu1
18-1ubuntu1.*
18-1ubuntu1.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "clevis",
            "binary_version":  "18-1ubuntu1.1"
        },
        {
            "binary_name":  "clevis-dracut",
            "binary_version":  "18-1ubuntu1.1"
        },
        {
            "binary_name":  "clevis-initramfs",
            "binary_version":  "18-1ubuntu1.1"
        },
        {
            "binary_name":  "clevis-luks",
            "binary_version":  "18-1ubuntu1.1"
        },
        {
            "binary_name":  "clevis-systemd",
            "binary_version":  "18-1ubuntu1.1"
        },
        {
            "binary_name":  "clevis-tpm2",
            "binary_version":  "18-1ubuntu1.1"
        },
        {
            "binary_name":  "clevis-udisks2",
            "binary_version":  "18-1ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109976.json"
Ubuntu:24.04:LTS
clevis

Package

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

Affected ranges

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

Affected versions

Other
19-3
19-6
19-6build1
19-6build2
20-1
20-1ubuntu0.*
20-1ubuntu0.24.04.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "clevis",
            "binary_version":  "20-1ubuntu0.24.04.1"
        },
        {
            "binary_name":  "clevis-dracut",
            "binary_version":  "20-1ubuntu0.24.04.1"
        },
        {
            "binary_name":  "clevis-initramfs",
            "binary_version":  "20-1ubuntu0.24.04.1"
        },
        {
            "binary_name":  "clevis-luks",
            "binary_version":  "20-1ubuntu0.24.04.1"
        },
        {
            "binary_name":  "clevis-systemd",
            "binary_version":  "20-1ubuntu0.24.04.1"
        },
        {
            "binary_name":  "clevis-tpm2",
            "binary_version":  "20-1ubuntu0.24.04.1"
        },
        {
            "binary_name":  "clevis-udisks2",
            "binary_version":  "20-1ubuntu0.24.04.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109976.json"
Ubuntu:26.04:LTS
clevis

Package

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

Affected ranges

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

Affected versions

Other
20-1
20-1build1
20-1ubuntu1
20-1ubuntu2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "clevis",
            "binary_version":  "20-1ubuntu2"
        },
        {
            "binary_name":  "clevis-dracut",
            "binary_version":  "20-1ubuntu2"
        },
        {
            "binary_name":  "clevis-initramfs",
            "binary_version":  "20-1ubuntu2"
        },
        {
            "binary_name":  "clevis-luks",
            "binary_version":  "20-1ubuntu2"
        },
        {
            "binary_name":  "clevis-systemd",
            "binary_version":  "20-1ubuntu2"
        },
        {
            "binary_name":  "clevis-tpm2",
            "binary_version":  "20-1ubuntu2"
        },
        {
            "binary_name":  "clevis-udisks2",
            "binary_version":  "20-1ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109976.json"
Ubuntu:26.10
clevis

Package

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

Affected ranges

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

Affected versions

Other
20-1ubuntu2
23-1
23-1build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "clevis",
            "binary_version":  "23-1build1"
        },
        {
            "binary_name":  "clevis-dracut",
            "binary_version":  "23-1build1"
        },
        {
            "binary_name":  "clevis-initramfs",
            "binary_version":  "23-1build1"
        },
        {
            "binary_name":  "clevis-luks",
            "binary_version":  "23-1build1"
        },
        {
            "binary_name":  "clevis-systemd",
            "binary_version":  "23-1build1"
        },
        {
            "binary_name":  "clevis-tpm2",
            "binary_version":  "23-1build1"
        },
        {
            "binary_name":  "clevis-udisks2",
            "binary_version":  "23-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-109976.json"