USN-8945-1

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Source
https://ubuntu.com/security/notices/USN-8945-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8945-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8945-1
Published
2026-10-20T17:45:10Z
Modified
2026-10-21T04:30:02Z
Summary
xz-utils vulnerability
Details

It was discovered that XZ Utils incorrectly handled certain memory allocation failures when reinitializing decoders for specific compressed file formats. An attacker could possibly use this issue to trigger an invalid memory write, resulting in a denial of service or arbitrary code execution.

References

Affected packages

Ubuntu:22.04:LTS
xz-utils

Package

Name
xz-utils
Purl
pkg:deb/ubuntu/xz-utils?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.2.5-2ubuntu1.2

Affected versions

5.*
5.2.5-2
5.2.5-2build1
5.2.5-2build2
5.2.5-2ubuntu1
5.2.5-2ubuntu1.1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "liblzma5",
            "binary_version":  "5.2.5-2ubuntu1.2"
        },
        {
            "binary_name":  "xz-utils",
            "binary_version":  "5.2.5-2ubuntu1.2"
        },
        {
            "binary_name":  "xzdec",
            "binary_version":  "5.2.5-2ubuntu1.2"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [],
    "ecosystem":  "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8945-1.json"
Ubuntu:24.04:LTS
xz-utils

Package

Name
xz-utils
Purl
pkg:deb/ubuntu/xz-utils?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.6.1+really5.4.5-1ubuntu0.4

Affected versions

5.*
5.4.1-0.2
5.4.4-0.1
5.4.5-0.1
5.4.5-0.3
5.6.0-0.2
5.6.1+really5.4.5-1
5.6.1+really5.4.5-1build0.1
5.6.1+really5.4.5-1ubuntu0.2
5.6.1+really5.4.5-1ubuntu0.3

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "liblzma5",
            "binary_version":  "5.6.1+really5.4.5-1ubuntu0.4"
        },
        {
            "binary_name":  "xz-utils",
            "binary_version":  "5.6.1+really5.4.5-1ubuntu0.4"
        },
        {
            "binary_name":  "xzdec",
            "binary_version":  "5.6.1+really5.4.5-1ubuntu0.4"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [],
    "ecosystem":  "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8945-1.json"
Ubuntu:26.04:LTS
xz-utils

Package

Name
xz-utils
Purl
pkg:deb/ubuntu/xz-utils?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.8.3-1ubuntu0.1

Affected versions

5.*
5.8.1-1build2
5.8.1-2
5.8.2-1
5.8.2-2
5.8.3-1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "liblzma5",
            "binary_version":  "5.8.3-1ubuntu0.1"
        },
        {
            "binary_name":  "xz-utils",
            "binary_version":  "5.8.3-1ubuntu0.1"
        },
        {
            "binary_name":  "xzdec",
            "binary_version":  "5.8.3-1ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [],
    "ecosystem":  "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8945-1.json"
Ubuntu:26.10
xz-utils

Package

Name
xz-utils
Purl
pkg:deb/ubuntu/xz-utils?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.8.3-1ubuntu1

Affected versions

5.*
5.8.3-1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "liblzma5",
            "binary_version":  "5.8.3-1ubuntu1"
        },
        {
            "binary_name":  "xz-utils",
            "binary_version":  "5.8.3-1ubuntu1"
        },
        {
            "binary_name":  "xzdec",
            "binary_version":  "5.8.3-1ubuntu1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [],
    "ecosystem":  "Ubuntu:26.10"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8945-1.json"
Ubuntu:Pro:14.04:LTS
xz-utils

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.1.1alpha+20120614-2ubuntu2.14.04.1+esm3

Affected versions

5.*
5.1.1alpha+20120614-2ubuntu1
5.1.1alpha+20120614-2ubuntu2
5.1.1alpha+20120614-2ubuntu2.14.04.1+esm1
5.1.1alpha+20120614-2ubuntu2.14.04.1+esm2

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "liblzma5",
            "binary_version":  "5.1.1alpha+20120614-2ubuntu2.14.04.1+esm3"
        },
        {
            "binary_name":  "xz-utils",
            "binary_version":  "5.1.1alpha+20120614-2ubuntu2.14.04.1+esm3"
        },
        {
            "binary_name":  "xzdec",
            "binary_version":  "5.1.1alpha+20120614-2ubuntu2.14.04.1+esm3"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [],
    "ecosystem":  "Ubuntu:Pro:14.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8945-1.json"
Ubuntu:Pro:16.04:LTS
xz-utils

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.1.1alpha+20120614-2ubuntu2.16.04.1+esm3

Affected versions

5.*
5.1.1alpha+20120614-2ubuntu2
5.1.1alpha+20120614-2ubuntu2.16.04.1+esm1
5.1.1alpha+20120614-2ubuntu2.16.04.1+esm2

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "liblzma5",
            "binary_version":  "5.1.1alpha+20120614-2ubuntu2.16.04.1+esm3"
        },
        {
            "binary_name":  "xz-utils",
            "binary_version":  "5.1.1alpha+20120614-2ubuntu2.16.04.1+esm3"
        },
        {
            "binary_name":  "xzdec",
            "binary_version":  "5.1.1alpha+20120614-2ubuntu2.16.04.1+esm3"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [],
    "ecosystem":  "Ubuntu:Pro:16.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8945-1.json"
Ubuntu:Pro:18.04:LTS
xz-utils

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.2.2-1.3ubuntu0.1+esm2

Affected versions

5.*
5.2.2-1.3
5.2.2-1.3ubuntu0.1
5.2.2-1.3ubuntu0.1+esm1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "liblzma5",
            "binary_version":  "5.2.2-1.3ubuntu0.1+esm2"
        },
        {
            "binary_name":  "xz-utils",
            "binary_version":  "5.2.2-1.3ubuntu0.1+esm2"
        },
        {
            "binary_name":  "xzdec",
            "binary_version":  "5.2.2-1.3ubuntu0.1+esm2"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [],
    "ecosystem":  "Ubuntu:Pro:18.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8945-1.json"
Ubuntu:Pro:20.04:LTS
xz-utils

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.2.4-1ubuntu1.1+esm2

Affected versions

5.*
5.2.4-1
5.2.4-1ubuntu1
5.2.4-1ubuntu1.1
5.2.4-1ubuntu1.1+esm1

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "liblzma5",
            "binary_version":  "5.2.4-1ubuntu1.1+esm2"
        },
        {
            "binary_name":  "xz-utils",
            "binary_version":  "5.2.4-1ubuntu1.1+esm2"
        },
        {
            "binary_name":  "xzdec",
            "binary_version":  "5.2.4-1ubuntu1.1+esm2"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [],
    "ecosystem":  "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8945-1.json"