CVE-2026-98806 octeontx2-pf: Fix aura BPID assignment when CONFIG_DCB is enabled
A null pointer dereference in the octeontx2-pf driver causes a kernel crash when CONFIG_DCB is enabled and SDP VFs are used.
- 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-2026-98806?
CVE-2026-98806 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:
octeontx2-pf: Fix aura BPID assignment when CONFIG_DCB is enabled
Previously, BPID assignment under CONFIG_DCB assumed `queue_to_pfc_map` was always initialized. For SDP VFs this leads to invalid memory access as it was not initialized.
This patch adds a NULL check for `queue_to_pfc_map` before dereferencing it. Also, simplifies the logic by always assigning a default BPID first, then conditionally overriding it if CONFIG_DCB is enabled and the map exists.
Which versions are affected by CVE-2026-98806?
How do I fix CVE-2026-98806?
Apply the vendor's patch.
Is CVE-2026-98806 being exploited?
There is no known exploitation of CVE-2026-98806 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-98806, DEBIAN-CVE-2026-98806, GHSA-jmhr-qgjx-cxxh, UBUNTU-CVE-2026-98806.