UBUNTU-CVE-2026-40613

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Source

https://ubuntu.com/security/CVE-2026-40613

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40613.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-40613

Upstream

CVE-2026-40613

Published

2026-04-21T19:16:00Z

Modified

2026-05-20T16:25:40.162475661Z

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

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.10.0, the STUN/TURN attribute parsing functions in coturn perform unsafe pointer casts from uint8t * to uint16t * without alignment checks. When processing a crafted STUN message with odd-aligned attribute boundaries, this results in misaligned memory reads at nsturnmsg.c. On ARM64 architectures (AArch64) with strict alignment enforcement, this causes a SIGBUS signal that immediately kills the turnserver process. An unauthenticated remote attacker can crash any ARM64 coturn deployment by sending a single crafted UDP packet. This vulnerability is fixed in 4.10.0.

References

Affected packages

Ubuntu:16.04:LTS

coturn

Package

Name: coturn
Purl: pkg:deb/ubuntu/coturn?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.4.5.4-2

4.5.0.2-3

4.5.0.3-1

4.5.0.3-1build1

4.5.0.3-1ubuntu0.2

4.5.0.3-1ubuntu0.3

4.5.0.3-1ubuntu0.4

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "coturn",
            "binary_version": "4.5.0.3-1ubuntu0.4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40613.json"

Ubuntu:18.04:LTS

coturn

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.5.0.6-1ubuntu2

4.5.0.7-1ubuntu1

4.5.0.7-1ubuntu2

4.5.0.7-1ubuntu2.18.04.1

4.5.0.7-1ubuntu2.18.04.2

4.5.0.7-1ubuntu2.18.04.3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "coturn",
            "binary_version": "4.5.0.7-1ubuntu2.18.04.3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40613.json"

Ubuntu:20.04:LTS

coturn

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.5.1.1-1.1build1

4.5.1.1-1.1build2

4.5.1.1-1.1ubuntu0.20.04.1

4.5.1.1-1.1ubuntu0.20.04.2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "coturn",
            "binary_version": "4.5.1.1-1.1ubuntu0.20.04.2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40613.json"

Ubuntu:22.04:LTS

coturn

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.5.2-3

4.5.2-3.1~ubuntu22.04.1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "coturn",
            "binary_version": "4.5.2-3.1~ubuntu22.04.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40613.json"

Ubuntu:24.04:LTS

coturn

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.6.1-1build1

4.6.1-1build2

4.6.1-1build3

4.6.1-1build4

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "coturn",
            "binary_version": "4.6.1-1build4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40613.json"

Ubuntu:25.10

coturn

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.6.1-2build1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "coturn",
            "binary_version": "4.6.1-2build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40613.json"

Ubuntu:26.04:LTS

coturn

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.6.1-2build1

4.6.1-2build2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "coturn",
            "binary_version": "4.6.1-2build2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40613.json"