CVE-2021-46909 ARM: footbridge: fix PCI interrupt mapping
A kernel oops occurs when PCI drivers are loaded after initialization due to incorrect interrupt mapping, causing a denial of service.
- 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-2021-46909?
CVE-2021-46909 is a medium-severity vulnerability in Linux kernel, published on 27 Feb 2024. 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:
ARM: footbridge: fix PCI interrupt mapping
Since commit 30fdfb929e82 ("PCI: Add a call to pci_assign_irq() in pci_device_probe()"), the PCI code will call the IRQ mapping function whenever a PCI driver is probed. If these are marked as __init, this causes an oops if a PCI driver is loaded or bound after the kernel has initialised.
Weakness: CWE-754
Which versions are affected by CVE-2021-46909?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-46909?
Apply the vendor's patch.
Is CVE-2021-46909 being exploited?
There is no known exploitation of CVE-2021-46909 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-46909, GHSA-7hx3-ggmh-4qrx, UBUNTU-CVE-2021-46909.