Vulnerability Report

CVE-2026-9639

Title: LXD Nil-Pointer Dereference in Custom Volume Backup

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2026-9639.

CWE Category CWE-476

Published Date Jun 26, 2026

Modified Date Jul 02, 2026

Exploit Status Not Found

Score 6.5 CVSS v3.1

Exploit Probability (EPSS)

0.39%

Vulnerability Summary

CVE-2026-9639: Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that omits the expires_at snapshot field.

Impacted Vendors

canonical 1

linuxcontainers 1

Reference Links

https://github.com/canonical/lxd/pull/18320 https://github.com/canonical/lxd/pull/18390 https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8

CVSS v3.1

Source Entity [email protected]

Severity MEDIUM

6.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-9639 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

July 02, 2026 MODIFIED

Vulnerability data updated via NVD.

June 26, 2026 MODIFIED

Vulnerability data updated via NVD.

June 26, 2026 MODIFIED

Vulnerability data updated via NVD.

June 26, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.