Incus vulnerable to DoS through antispoofing nftables firewall rule bypass on bridge networks with ACLs (lxc incus)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.25 % · percentile 17 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Deferred
Description
Incus is a system container and virtual machine manager. When using an ACL on a device connected to a bridge, Incus version 6.12 and 6.13 generates nftables rules for local services (DHCP, DNS...) that partially bypass security options `security.mac_filtering`, `security.ipv4_filtering` and `security.ipv6_filtering`. This can lead to DHCP pool exhaustion and opens the door for other attacks. A patch is available at commit 2516fb19ad8428454cb4edfe70c0a5f0dc1da214.
Weaknesses (CWE)
- CWE-770 — Allocation of Resources Without Limits or Throttling
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | LOW 3.4 | CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L | GitHub_M |
| CVSS 3.1 | LOW 3.4 | CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L | NVD · security-advisories@github.com (Secondary) |
Advisories
- GHSA-9q7c-qmhm-jv86 — Incus Allocation of Resources Without Limits allows firewall rule bypass on managed bridge networks
- GO-2025-3781 — Incus Allocation of Resources Without Limits allows firewall rule bypass on managed bridge networks in github.com/lxc/incus
European references
- ENISA EUVD · EUVD-2025-19115
- GCVE · GCVE-0-2025-52889
Affected products
| Product | Versions |
|---|---|
| lxc · incus | affected >= 6.12, <= 6.13 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |