8.1

CVE-2025-52890: lxc incus Incorrect Authorization

CVSS: 8.1v3.1HighDeferred
AliasesUBUNTU-CVE-2025-52890GHSA-p7fw-vjjm-2rwpGO-2025-3782
Published 25-06-2025Last modified 25-06-2025
Open JSON

Vulnerability summary

CVE-2025-52890 is a high (CVSS 8.1) Incorrect Authorization vulnerability in lxc incus. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.23%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2025:15317-1OPENSUSE-SU-2025:15405-1

Timeline

  1. 25-06-2025
    PublishedVulnerability first disclosed.
  2. 25-06-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

+0.02 pp

From 0.21% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Github.com/lxc1 product
  • incusAll versions (No fix recorded)
Github.com/lxc/incus1 product
  • v6≥ 6.12.0, < 6.14.0
Lxc1 product
Ubuntu1 product
  • incusAll versions (No fix recorded)

4 vendors · 4 products

References

6 links