CVE-2026-33542: Incus does not verify combined fingerprint when downloading images from simplestreams servers
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.
References
- github.com/advisories/GHSA-p8mm-23gg-jc9r
- github.com/lxc/incus
- github.com/lxc/incus/commit/04e97418189f743411884afb81a3384e6218b8cd
- github.com/lxc/incus/commit/4a80447c52d6bc05d3322feeb5395f581e7a80e4
- github.com/lxc/incus/commit/72688b7d9400c8f3c17ad0f93a7c1aeb89627307
- github.com/lxc/incus/commit/ee26f72524ab60a4abcfd4e52667c52bb24364fc
- github.com/lxc/incus/releases/tag/v6.23.0
- github.com/lxc/incus/security/advisories/GHSA-p8mm-23gg-jc9r
- nvd.nist.gov/vuln/detail/CVE-2026-33542
Code Behaviors & Features
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