CVE-2026-40251: Incus is a system container and virtual machine manager

Q: How do I fix CVE-2026-40251?

incus: upgrade to 7.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-40251 being exploited?

CVE-2026-40251 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40251 affect?

CVE-2026-40251 affects incus. Severity is medium (CVSS 6.5). 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

Q: How urgent is CVE-2026-40251?

Priority 41/100. Public exploit reference; On your watchlist

This month

MEDIUM 6.5WATCHLISTUPGRADE

CVE-2026-40251 is a medium-severity flaw (CVSS 6.5) affecting incus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 to crash. The backup restore subsystem contains an out-of-bounds panic vulnerability caused by an invalid bounds check when indexing snapshot metadata arrays, and the same flawed pattern also appears in the mig

Why this priority

Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-129
Published	2026-05-06
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: linuxcontainers

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-06 21:16 UTCPublished CVE record published
2026-10-26 19:10 UTCUpdated Record last modified

linuxcontainers incus UPGRADE

Affected: < 7.0.0

Fixed in: 7.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy incus || rpm -q incus || incus --version

2. UPGRADE to 7.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade incus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade incus

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40251?

incus: upgrade to 7.0.0. Exact commands for each OS are on this page.

Is CVE-2026-40251 being exploited?

CVE-2026-40251 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40251 affect?

CVE-2026-40251 affects incus. Severity is medium (CVSS 6.5). 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

How urgent is CVE-2026-40251?

Priority 41/100. Public exploit reference; On your watchlist

Related CVEs

CVE-2026-41648 MEDIUM 5.0 UPGRADE Incus is a system container and virtual machine manager
CVE-2026-41647 MEDIUM 6.5 UPGRADE Incus is a system container and virtual machine manager
CVE-2026-41684 MEDIUM 6.5 UPGRADE Incus is a system container and virtual machine manager
CVE-2026-41685 MEDIUM 4.3 UPGRADE Incus is a system container and virtual machine manager
CVE-2026-40195 MEDIUM 6.5 UPGRADE Incus is a system container and virtual machine manager

References

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