CVE-2026-23070 Octeontx2-af: Add proper checks for fwdata
A missing check in the Octeontx2-af driver causes a kernel panic when accessing firmware data on boards without a MAC block.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-23070?
CVE-2026-23070 is a medium-severity vulnerability in Linux kernel, published on 4 Feb 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-af: Add proper checks for fwdata
firmware populates MAC address, link modes (supported, advertised) and EEPROM data in shared firmware structure which kernel access via MAC block(CGX/RPM).
Accessing fwdata, on boards booted with out MAC block leading to kernel panics.
Internal error: Oops: 0000000096000005 [#1] SMP [ 10.460721] Modules linked in: [ 10.463779] CPU: 0 UID: 0 PID: 174 Comm: kworker/0:3 Not tainted 6.19.0-rc5-00154-g76ec646abdf7-dirty #3 PREEMPT [ 10.474045] Hardware name: Marvell OcteonTX CN98XX board (DT) [ 10.479793] Workqueue: events work_for_cpu_fn [ 10.484159] pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 10.491124] pc : rvu_sdp_init+0x18/0x114 [ 10.495051] lr : rvu_probe+0xe58/0x1d18
Which versions are affected by CVE-2026-23070?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23070?
Apply the vendor's patch.
Is CVE-2026-23070 being exploited?
There is no known exploitation of CVE-2026-23070 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-23070, DEBIAN-CVE-2026-23070, GHSA-692f-c3g3-7699, ROOT-OS-DEBIAN-13-CVE-2026-23070, UBUNTU-CVE-2026-23070.