CVE-2026-90106 net: bridge: arp/nd proxy: fix reading neigh ha
A race condition in the Linux kernel bridge ARP/ND proxy allows torn reads of neighbor hardware addresses, potentially causing data corruption or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90106?
CVE-2026-90106 is a vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: bridge: arp/nd proxy: fix reading neigh ha
Currently neigh ha address is read directly, but that can result in torn/partial reads if the neigh is being updated. Use neigh_ha_snapshot to take a stable snapshot of the address.
Which versions are affected by CVE-2026-90106?
How do I fix CVE-2026-90106?
Apply the vendor's patch.
Is CVE-2026-90106 being exploited?
There is no known exploitation of CVE-2026-90106 in the wild and no public exploit code.
Sources
Also known as AZL-102432, BELL-CVE-2026-90106, DEBIAN-CVE-2026-90106, GHSA-gcv9-cqh3-4c3g, UBUNTU-CVE-2026-90106.