High severity · published Jun 25, 2025
CVE-2025-52890
Incus vulnerable to antispoofing nftables firewall rule bypass on bridge networks with ACLs
8.1
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IN
incus · lxc
>= 6.12, <= 6.13 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-52890
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-52890
github.com
https://github.com/lxc/incus/commit/254dfd2483ab8de39b47c2258b7f1cf0759231c8
github.com
https://github.com/lxc/incus/security/advisories/GHSA-p7fw-vjjm-2rwp
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