What is CVE-2026-40251?

CVE-2026-40251 is a medium-severity vulnerability in Linuxcontainers Incus, classified under Improper Validation of Array Index. CVSS score: 6.5/10. Published 2026-05-06.

How severe is CVE-2026-40251?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Linuxcontainers Incus

CVE-2026-40251

Incus is a system container and virtual machine manager. In versions before 7.0.0, missing validation logic in the storage volume import logic allows an authenticated user with access to the storage volume feature to cause the Incus daemon…

EPSS: 0.000 (3.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linuxcontainers Incus
Lxc Incus — versions < 7.0.0

Weakness classification (CWE)

CWE-129 — Improper Validation of Array Index

References

https://github.com/lxc/incus/security/advisories/GHSA-4m88-wxj4-9qj6 (x_refsource_CONFIRM, Exploit, Vendor Advisory)
https://github.com/lxc/incus/blob/v6.22.0/internal/server/storage/backend.go (Product, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-40251?: CVE-2026-40251 is a medium-severity vulnerability in Linuxcontainers Incus, classified under Improper Validation of Array Index. CVSS score: 6.5/10. Published 2026-05-06.
How severe is CVE-2026-40251?: Medium severity. CVSS v3 base score is 6.5 out of 10.