CVE-2026-46203 spi: cadence-quadspi: fix unclocked access on unbind
A missing runtime resume in the Cadence QSPI driver causes unclocked register access during unbind, potentially leading to a kernel crash.
- 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-2026-46203?
CVE-2026-46203 is a high-severity vulnerability in Linux kernel, published on 28 May 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:
spi: cadence-quadspi: fix unclocked access on unbind
Make sure that the controller is runtime resumed before disabling it during driver unbind to avoid an unclocked register access.
This issue was flagged by Sashiko when reviewing a controller deregistration fix.
Weakness: CWE-125
Which versions are affected by CVE-2026-46203?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46203?
Apply the vendor's patch.
Is CVE-2026-46203 being exploited?
There is no known exploitation of CVE-2026-46203 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-46203, DEBIAN-CVE-2026-46203, GHSA-j454-pvhh-fcmq, ROOT-OS-DEBIAN-13-CVE-2026-46203, ROOT-OS-UBUNTU-2404-CVE-2026-46203, UBUNTU-CVE-2026-46203.