What’s Vulnerable › Vulnerabilities

CVE-2025-52889: Incus vulnerable to DoS through antispoofing nftables firewall rule bypass on bridge networks with ACLs

• Severity: low (CVSS 3.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-25 · updated 2026-06-17
• Weakness: CWE-770

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 products

• lxc incus: from 6.12, <= 6.13

References

• https://github.com/lxc/incus/commit/2516fb19ad8428454cb4edfe70c0a5f0dc1da214
• https://github.com/lxc/incus/commit/a7c33301738aede3c035063e973b1d885d9bac7c
• https://github.com/lxc/incus/security/advisories/GHSA-9q7c-qmhm-jv86
• https://github.com/lxc/incus/security/advisories/GHSA-9q7c-qmhm-jv86

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