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

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.

Published: 2025-06-25 Last update: 2026-04-15 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-52889 is rated Low Risk (24.2/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.11%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-52889

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-21 0.02% 0.11% +0.10%
2 2025-06-26 — 0.02% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-52889

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.4 3.1 LOW
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.7 1.4 [email protected]

Weakness enumeration for CVE-2025-52889

GitHub Security Advisory for CVE-2025-52889

GHSA-9q7c-qmhm-jv86 · Severity: low · Ecosystem: go — Incus Allocation of Resources Without Limits allows firewall rule bypass on managed bridge networks

OS Trackers for CVE-2025-52889

vendor priority summary link
alpine low CVE-2025-52889: 1 source package rows (incus-feature); 1 state rows across 1 repos (edge-community); fixed 1, open 0. https://security.alpinelinux.org/vuln/CVE-2025-52889
debian unimportant CVE-2025-52889 unimportant priority: Debian including 1 source packages (incus), 3 status rows across 3 suites (forky, sid, trixie): resolved 3. https://security-tracker.debian.org/tracker/CVE-2025-52889
ubuntu medium CVE-2025-52889 medium priority: Ubuntu including 1 source packages (incus), 6 status rows across 6 suites (jammy, noble, oracular, plucky, questing, upstream): needs-triage 3, ignored 2, DNE 1. https://ubuntu.com/security/CVE-2025-52889

Affected software / configurations for CVE-2025-52889

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-52889

cvelogic Threat Intelligence