CVE-2025-64507: incus Privilege Escalation

Description

Incus is a system container and virtual machine manager. An issue in versions prior to 6.0.6 and 6.19.0 affects any Incus user in an environment where an unprivileged user may have root access to a container with an attached custom storage volume that has the `security.shifted` property set to `true` as well as access to the host as an unprivileged user. The most common case for this would be systems using `incus-user` with the less privileged `incus` group to provide unprivileged users with an isolated restricted access to Incus. Such users may be able to create a custom storage volume with the necessary property (depending on kernel and filesystem support) and can then write a setuid binary from within the container which can be executed as an unprivileged user on the host to gain root privileges. A patch for this issue is expected in versions 6.0.6 and 6.19.0. As a workaround, permissions can be manually restricted until a patched version of Incus is deployed.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-269 CWE-269

Affected Products

Vendor	Product	Versions
linuxcontainers	incus	< 6.0.6
linuxcontainers	incus	6.1.0 — 6.19.0

References

Advisories & Patches

https://github.com/lxc/incus/issues/2641 https://github.com/lxc/incus/pull/2642 https://github.com/lxc/incus/security/advisories/GHSA-56mx-8g9f-5crf https://github.com/lxc/incus/issues/2641

Exploits

https://github.com/lxc/incus/issues/2641 https://github.com/lxc/incus/pull/2642 https://github.com/lxc/incus/security/advisories/GHSA-56mx-8g9f-5crf https://github.com/lxc/incus/issues/2641

Frequently Asked Questions

What is CVE-2025-64507? +

Incus is a system container and virtual machine manager. An issue in versions prior to 6.0.6 and 6.19.0 affects any Incus user in an environment where an unprivileged user may have root access to a container with an attached custom storage volume that has the `security.shifted` property set to `true` as well as access to the host as an unprivileged user. The most common case for this would be systems using `incus-user` with the less privileged `incus` group to provide unprivileged users with an isolated restricted access to Incus. Such users may be able to create a custom storage volume with the necessary property (depending on kernel and filesystem support) and can then write a setuid binary from within the container which can be executed as an unprivileged user on the host to gain root privileges. A patch for this issue is expected in versions 6.0.6 and 6.19.0. As a workaround, permissions can be manually restricted until a patched version of Incus is deployed. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-64507? +

CVE-2025-64507 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-64507? +

CVE-2025-64507 affects products from linuxcontainers, specifically: incus. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-64507? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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