CVE-2025-52890: Lxc Incus

High severity, CVSS 8.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Incus is a system container and virtual machine manager. When using an ACL on a device connected to a bridge, Incus versions 6.12 and 6.13generates nftables rules that partially bypass security options `security.mac_filtering`, `security.ipv4_filtering` and `security.ipv6_filtering`. This can lead to ARP spoofing on the bridge and to fully spoof another VM/container on the same bridge. Commit 254dfd2483ab8de39b47c2258b7f1cf0759231c8 contains a patch for the issue.

Affected products

• Lxc Incus: from 6.12, up to and including 6.13

Published 2025-06-25. Last modified 2026-06-17.