CVE-2026-9639 | Nil-pointer dereference in CreateCustomVolumeFromBackup in L… | CVSS 6.5 MEDIUM

Description

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.

Metadata

CVE ID: CVE-2026-9639
State: PUBLISHED
Assigner: canonical
Reserved: 2026-05-26 18:31 UTC
Published: 2026-06-26 15:39 UTC
Last updated: 2026-06-26 16:02 UTC
Primary CWE: CWE-476
CWE-476 NULL pointer dereference
Vendor / Product: Canonical / LXD
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
Canonical	LXD	Linux	5.21.0 < 5.21.5, 6.0 < 6.9

Weakness (CWE)

CWE	Source	Description
CWE-476	cna	CWE-476 NULL pointer dereference

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References (3)