Vulnerability · Published Jun 25, 2025 · Assigned by GitHub_M
CVE-2025-52889Incus vulnerable to DoS through antispoofing nftables firewall rule bypass on bridge networks with ACLs
Low 3.4
In plain English
A low-severity resource allocation without limits in incus from lxc. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | incus-feature | 6.14.0-r0 | ALPINE-CVE-2025-52889 |
| Alpine:v3.24 | incus-feature | 6.14.0-r0 | ALPINE-CVE-2025-52889 |
| Go | github.com/lxc/incus | no fix listed | GO-2025-3781 |
| Go | github.com/lxc/incus/v6 | 6.14.0 | GHSA-9q7c-qmhm-jv86 |
| Go | github.com/lxc/incus/v6 | 6.14.0 | GO-2025-3781 |
| Ubuntu:25.10 | incus | no fix listed | UBUNTU-CVE-2025-52889 |
| Ubuntu:26.10 | incus | no fix listed | UBUNTU-CVE-2025-52889 |
Affected products (as reported)
Weakness: CWE-770 · Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L