UBUNTU-CVE-2026-44673

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Source
https://ubuntu.com/security/CVE-2026-44673
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44673.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-44673
Upstream
  • CVE-2026-44673
Published
2026-05-14T21:16:00Z
Modified
2026-05-20T22:03:08.619430470Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

libyang is a YANG data modeling language library. Prior to SO 5.2.15, lybreadstring() in src/parser_lyb.c contains an integer overflow that results in a heap buffer overflow when parsing a maliciously crafted LYB binary blob. An attacker who can supply LYB data to any libyang consumer (NETCONF server, sysrepo, etc.) can trigger a crash or potential heap corruption. This vulnerability is fixed in SO 5.2.15.

References

Affected packages

Ubuntu:20.04:LTS
libyang

Package

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

Affected ranges

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

Affected versions

0.*
0.16.105-1
0.16.105-2
0.16.105-3
0.16.105-3build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyang-cpp0.16",
            "binary_version": "0.16.105-3build1"
        },
        {
            "binary_name": "libyang0.16",
            "binary_version": "0.16.105-3build1"
        },
        {
            "binary_name": "python3-yang",
            "binary_version": "0.16.105-3build1"
        },
        {
            "binary_name": "yang-tools",
            "binary_version": "0.16.105-3build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44673.json"
Ubuntu:22.04:LTS
libyang

Package

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

Affected ranges

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

Affected versions

1.*
1.0.225-1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyang-cpp1",
            "binary_version": "1.0.225-1.1"
        },
        {
            "binary_name": "libyang-tools",
            "binary_version": "1.0.225-1.1"
        },
        {
            "binary_name": "libyang1",
            "binary_version": "1.0.225-1.1"
        },
        {
            "binary_name": "yang-tools",
            "binary_version": "1.0.225-1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44673.json"
libyang2

Package

Name
libyang2
Purl
pkg:deb/ubuntu/libyang2?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.0.112-6
2.0.112-6ubuntu1
2.0.112-6ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyang-tools",
            "binary_version": "2.0.112-6ubuntu2"
        },
        {
            "binary_name": "libyang2",
            "binary_version": "2.0.112-6ubuntu2"
        },
        {
            "binary_name": "libyang2-tools",
            "binary_version": "2.0.112-6ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44673.json"
Ubuntu:24.04:LTS
libyang2

Package

Name
libyang2
Purl
pkg:deb/ubuntu/libyang2?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.1.30-2
2.1.30-2.1
2.1.30-2.1build1
2.1.30-2.1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyang-tools",
            "binary_version": "2.1.30-2.1ubuntu0.1"
        },
        {
            "binary_name": "libyang2-tools",
            "binary_version": "2.1.30-2.1ubuntu0.1"
        },
        {
            "binary_name": "libyang2t64",
            "binary_version": "2.1.30-2.1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44673.json"
Ubuntu:25.10
libyang

Package

Name
libyang
Purl
pkg:deb/ubuntu/libyang?arch=source&distro=questing

Affected ranges

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

Affected versions

3.*
3.7.8-3
3.12.2-1
3.12.2-1ubuntu1
3.13.5-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyang3",
            "binary_version": "3.13.5-2"
        },
        {
            "binary_name": "libyang3-tools",
            "binary_version": "3.13.5-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44673.json"
Ubuntu:26.04:LTS
libyang

Package

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

Affected ranges

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

Affected versions

3.*
3.13.5-2
3.13.6-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libyang3",
            "binary_version": "3.13.6-1"
        },
        {
            "binary_name": "libyang3-tools",
            "binary_version": "3.13.6-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44673.json"