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Fencer Vulns
high 8.1

CVE-2025-52890 json

Incus vulnerable to antispoofing nftables firewall rule bypass on bridge networks with ACLs

published 2025-06-25 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-19114 , GHSA-p7fw-vjjm-2rwp , GO-2025-3782

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/lxc/incus/v6 6.14.0
  • linuxcontainers incus 6.14
  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250730T213748-1.1
  • incus openSUSE Tumbleweed 6.14-1.1

opensuse advisories openSUSE-SU-2025:15405-1openSUSE-SU-2025:15317-1

  • incus-feature Alpine 3.24, Alpine 3.23 6.14.0-r0

alpine advisories ALPINE-CVE-2025-52890

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-52890 updated cvss 8.1

incus: Incus firewall rule bypass

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
16 mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/lxc/incus/security/advisories/GHSA-p7fw-vjjm-2rwp referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:H
GitHub 3.1 8.1 CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/lxc/incus/v6
>=6.12.0, <6.14.0
6.14.0
go github.com/lxc/incus
all versions
 no fix listed

Affected products

  • lxc incus

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.