CVE-2026-98618 eth: fbnic: Handle maximum standalone channels
A null pointer dereference in the fbnic network driver can cause a kernel crash when configuring high channel counts, leading to 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-2026-98618?
CVE-2026-98618 is a vulnerability in Linux, published on 18 Oct 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:
eth: fbnic: Handle maximum standalone channels
Standalone channels use one NAPI vector for each Tx and Rx queue. fbnic's allocation path excludes FBNIC_MAX_TXQS from that layout. A 64-Tx/64-Rx configuration therefore records 128 vectors but allocates only 64, leaving NULL entries that resource setup dereferences.
Include the maximum vector count in standalone allocation.
Which versions are affected by CVE-2026-98618?
How do I fix CVE-2026-98618?
Apply the vendor's patch.
Is CVE-2026-98618 being exploited?
There is no known exploitation of CVE-2026-98618 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-98618, DEBIAN-CVE-2026-98618, GHSA-qp9r-4gxq-qwmm, UBUNTU-CVE-2026-98618.