CVE-2026-46301 spi: topcliff-pch: fix use-after-free on unbind
A use-after-free vulnerability in the Linux kernel's topcliff-pch SPI driver allows attackers to cause denial of service or execute code during driver unbind.
- 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-2026-46301?
CVE-2026-46301 is a high-severity use after free vulnerability in Linux kernel, published on 8 Jun 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: topcliff-pch: fix use-after-free on unbind
Give the driver a chance to flush its queue before releasing the DMA buffers on driver unbind
Weakness: CWE-416
Which versions are affected by CVE-2026-46301?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46301?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-46301 being exploited?
There is no known exploitation of CVE-2026-46301 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-46301, DEBIAN-CVE-2026-46301, GHSA-fg92-r9x5-ch82, ROOT-OS-DEBIAN-11-CVE-2026-46301, ROOT-OS-DEBIAN-12-CVE-2026-46301, UBUNTU-CVE-2026-46301.