UBUNTU-CVE-2026-56109

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Source
https://ubuntu.com/security/CVE-2026-56109
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56109.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-56109
Upstream
Downstream
Related
Published
2026-06-22T18:16:00Z
Modified
2026-07-14T23:30:16Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H CVSS Calculator
  • 7.0 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The Advanced Linux Sound Architecture (ALSA) library before 1.2.16.1 contains a double-free vulnerability in parse_def() in src/conf.c that allows attackers to corrupt memory by supplying maliciously crafted ALSA configuration text. When parsing nested compound or array configuration blocks, parse_def() fails to check return values before continuing, causing snd_config_delete() to be called twice on the same already-freed node, resulting in a NULL-pointer write or invalid memory read.

References

Affected packages

Ubuntu:14.04:LTS
alsa-lib

Package

Name
alsa-lib
Purl
pkg:deb/ubuntu/alsa-lib?arch=source&distro=trusty

Affected ranges

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

Affected versions

1.*
1.0.27.2-1ubuntu6
1.0.27.2-1ubuntu7
1.0.27.2-3ubuntu1
1.0.27.2-3ubuntu2
1.0.27.2-3ubuntu5
1.0.27.2-3ubuntu6
1.0.27.2-3ubuntu7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libasound2",
            "binary_version": "1.0.27.2-3ubuntu7"
        },
        {
            "binary_name": "libasound2-data",
            "binary_version": "1.0.27.2-3ubuntu7"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56109.json"
Ubuntu:16.04:LTS
alsa-lib

Package

Name
alsa-lib
Purl
pkg:deb/ubuntu/alsa-lib?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.0.29-0ubuntu1
1.1.0-0ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libasound2",
            "binary_version": "1.1.0-0ubuntu1"
        },
        {
            "binary_name": "libasound2-data",
            "binary_version": "1.1.0-0ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56109.json"
Ubuntu:18.04:LTS
alsa-lib

Package

Name
alsa-lib
Purl
pkg:deb/ubuntu/alsa-lib?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.1.3-5
1.1.3-5ubuntu0.1
1.1.3-5ubuntu0.2
1.1.3-5ubuntu0.4
1.1.3-5ubuntu0.5
1.1.3-5ubuntu0.6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libasound2",
            "binary_version": "1.1.3-5ubuntu0.6"
        },
        {
            "binary_name": "libasound2-data",
            "binary_version": "1.1.3-5ubuntu0.6"
        },
        {
            "binary_name": "libasound2-plugin-smixer",
            "binary_version": "1.1.3-5ubuntu0.6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56109.json"
Ubuntu:22.04:LTS
alsa-lib

Package

Name
alsa-lib
Purl
pkg:deb/ubuntu/alsa-lib?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.2.6.1-1ubuntu1.2

Affected versions

1.*
1.2.4-1.1ubuntu3
1.2.4-1.1ubuntu4
1.2.5.1-1ubuntu1
1.2.6.1-1ubuntu1
1.2.6.1-1ubuntu1.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libasound2",
            "binary_version": "1.2.6.1-1ubuntu1.2"
        },
        {
            "binary_name": "libasound2-data",
            "binary_version": "1.2.6.1-1ubuntu1.2"
        },
        {
            "binary_name": "libasound2-plugin-smixer",
            "binary_version": "1.2.6.1-1ubuntu1.2"
        },
        {
            "binary_name": "libatopology2",
            "binary_version": "1.2.6.1-1ubuntu1.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56109.json"
Ubuntu:24.04:LTS
alsa-lib

Package

Name
alsa-lib
Purl
pkg:deb/ubuntu/alsa-lib?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.2.11-1ubuntu0.3

Affected versions

1.*
1.2.9-2
1.2.10-1
1.2.10-2
1.2.10-3
1.2.10-3build1
1.2.11-1build1
1.2.11-1build2
1.2.11-1ubuntu0.1
1.2.11-1ubuntu0.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libasound2-data",
            "binary_version": "1.2.11-1ubuntu0.3"
        },
        {
            "binary_name": "libasound2-plugin-smixer",
            "binary_version": "1.2.11-1ubuntu0.3"
        },
        {
            "binary_name": "libasound2t64",
            "binary_version": "1.2.11-1ubuntu0.3"
        },
        {
            "binary_name": "libatopology2t64",
            "binary_version": "1.2.11-1ubuntu0.3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56109.json"
Ubuntu:25.10
alsa-lib

Package

Name
alsa-lib
Purl
pkg:deb/ubuntu/alsa-lib?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*
1.2.13-1build1
1.2.14-1
1.2.14-1ubuntu1
1.2.14-1ubuntu1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libasound2-data",
            "binary_version": "1.2.14-1ubuntu1.1"
        },
        {
            "binary_name": "libasound2-plugin-smixer",
            "binary_version": "1.2.14-1ubuntu1.1"
        },
        {
            "binary_name": "libasound2t64",
            "binary_version": "1.2.14-1ubuntu1.1"
        },
        {
            "binary_name": "libatopology2t64",
            "binary_version": "1.2.14-1ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56109.json"
Ubuntu:26.04:LTS
alsa-lib

Package

Name
alsa-lib
Purl
pkg:deb/ubuntu/alsa-lib?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.2.15.3-1ubuntu1.1

Affected versions

1.*
1.2.14-1ubuntu1
1.2.14-2ubuntu1
1.2.15-2
1.2.15.1-1
1.2.15.3-1
1.2.15.3-1build1
1.2.15.3-1ubuntu1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libasound2-data",
            "binary_version": "1.2.15.3-1ubuntu1.1"
        },
        {
            "binary_name": "libasound2-plugin-smixer",
            "binary_version": "1.2.15.3-1ubuntu1.1"
        },
        {
            "binary_name": "libasound2t64",
            "binary_version": "1.2.15.3-1ubuntu1.1"
        },
        {
            "binary_name": "libatopology2t64",
            "binary_version": "1.2.15.3-1ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56109.json"
Ubuntu:Pro:20.04:LTS
alsa-lib

Package

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

Affected ranges

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

Affected versions

1.*
1.1.9-0ubuntu1
1.2.1.2-2ubuntu2
1.2.2-2ubuntu1
1.2.2-2.1
1.2.2-2.1ubuntu1
1.2.2-2.1ubuntu2
1.2.2-2.1ubuntu2.1
1.2.2-2.1ubuntu2.2
1.2.2-2.1ubuntu2.3
1.2.2-2.1ubuntu2.4
1.2.2-2.1ubuntu2.5
1.2.2-2.1ubuntu2.5+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libasound2",
            "binary_version": "1.2.2-2.1ubuntu2.5+esm1"
        },
        {
            "binary_name": "libasound2-data",
            "binary_version": "1.2.2-2.1ubuntu2.5+esm1"
        },
        {
            "binary_name": "libasound2-plugin-smixer",
            "binary_version": "1.2.2-2.1ubuntu2.5+esm1"
        },
        {
            "binary_name": "libatopology2",
            "binary_version": "1.2.2-2.1ubuntu2.5+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56109.json"