Description
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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| lxc | incus | < 6.23.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | incus | 6.0.6-2 | — |
| Debian 13 | incus | 6.0.4-2+deb13u5 | DSA-6184-1 |
| Debian 13 | lxd | 5.0.2+git20231211.1364ae4-9+deb13u4 | DSA-6188-1 |
| Debian 12 | lxd | 5.0.2-5+deb12u4 | DSA-6188-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | incus | No fix yet | — |
| Ubuntu 25.10 | incus | No fix yet | — |
| Ubuntu 20.04 LTS | lxd | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | incus | No fix yet | — |
| Ubuntu Pro 24.04 LTS | incus | No fix yet | — |
| Ubuntu Pro 18.04 LTS | lxd | No fix yet | — |
| Ubuntu Pro 16.04 LTS | lxd | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | incus | 6.23-1.1 | openSUSE-SU-2026:10450-1 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/lxc/incus | all versions | — | GO-2026-4882 |
| Go | github.com/lxc/incus/v6 | < 6.23.0 | 6.23.0 | GO-2026-4882 |
| Go | github.com/lxc/incus/v6/client | < 6.23.0 | 6.23.0 | GHSA-p8mm-23gg-jc9r |
Advisories 4
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- DSA-6188-1 lxd - security update Debian Security (DSA / DLA) · Mar 31, 2026
- DSA-6184-1 incus - security update Debian Security (DSA / DLA) · Mar 29, 2026
- openSUSE-SU-2026:10450-1 incus-6.23-1.1 on GA media SUSE / openSUSE Security Updates · Mar 29, 2026