CVE-2022-49074 irqchip/gic-v3: Fix GICR_CTLR.RWP polling
Incorrect bit polling in the GICv3 redistributor control register can cause the kernel to hang or fail to initialize interrupt controllers properly.
- 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-2022-49074?
CVE-2022-49074 is a medium-severity vulnerability in Linux kernel, published on 26 Feb 2025. 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:
irqchip/gic-v3: Fix GICR_CTLR.RWP polling
It turns out that our polling of RWP is totally wrong when checking for it in the redistributors, as we test the *distributor* bit index, whereas it is a different bit number in the RDs... Oopsie boo.
This is embarassing. Not only because it is wrong, but also because it took *8 years* to notice the blunder...
Just fix the damn thing.
Which versions are affected by CVE-2022-49074?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49074?
Apply the vendor's patch.
Is CVE-2022-49074 being exploited?
There is no known exploitation of CVE-2022-49074 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49074, GHSA-4m74-wv34-4crh, UBUNTU-CVE-2022-49074.