high7.0
CVE-2026-33542
Incus does not verify combined fingerprint when downloading images from simplestreams servers
Impact
Incus is a system container and virtual machine manager. Prior to version 6.23.0, a lack of validation of the image fingerprint when downloading from simplestreams image servers opens the door to image cache poisoning and under very narrow circumstances exposes other tenants to running attacker controlled images rather than the expected one. Version 6.23.0 patches the issue.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/lxc/incus/v6/client | < 6.23.0 | 6.23.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linuxcontainers | Incus | before 6.23.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-p8mm-23gg-jc9r
- https://github.com/lxc/incus/security/advisories/GHSA-p8mm-23gg-jc9r
- https://nvd.nist.gov/vuln/detail/CVE-2026-33542
- https://github.com/lxc/incus/commit/04e97418189f743411884afb81a3384e6218b8cd
- https://github.com/lxc/incus/commit/4a80447c52d6bc05d3322feeb5395f581e7a80e4
- https://github.com/lxc/incus/commit/72688b7d9400c8f3c17ad0f93a7c1aeb89627307
- https://github.com/lxc/incus/commit/ee26f72524ab60a4abcfd4e52667c52bb24364fc
- https://github.com/lxc/incus/releases/tag/v6.23.0