Low severity · published Jun 25, 2025
CVE-2025-52889
Incus vulnerable to DoS through antispoofing nftables firewall rule bypass on bridge networks with ACLs
3.4
CVSS
0.3%
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 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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
Attack vector
Adjacent
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% 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-2025-52889
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-52889
github.com
https://github.com/lxc/incus/commit/2516fb19ad8428454cb4edfe70c0a5f0dc1da214
github.com
https://github.com/lxc/incus/commit/a7c33301738aede3c035063e973b1d885d9bac7c
github.com
https://github.com/lxc/incus/security/advisories/GHSA-9q7c-qmhm-jv86
More from incus
9.9
CVE-2026-115377
Incus before 6.0.7, 6.1.0 before 7.0.2, and 7.1.0 before 7.5.0 Arbitrary File Write via Symlink in Migration Stream
9.9
CVE-2026-115375
Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Path Traversal via Instance Backup Dependent Volumes
9.9
CVE-2026-63343
Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root
9.9
CVE-2026-63125
Incus vulnerable to root RCE via image backup.yaml symlink
9.9
CVE-2026-62941
Incus: Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge