CVE-2025-22012 Revert "arm64: dts: qcom: sdm845: Affirm IDR0.CCTW on apps_smmu"
A kernel regression caused system lock-ups and resets on specific Qualcomm devices due to incorrect cache coherency assumptions in the SMMU driver.
- 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-2025-22012?
CVE-2025-22012 is a high-severity denial of service vulnerability in Linux kernel, published on 8 Apr 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:
Revert "arm64: dts: qcom: sdm845: Affirm IDR0.CCTW on apps_smmu"
There are reports that the pagetable walker cache coherency is not a given across the spectrum of SDM845/850 devices, leading to lock-ups and resets. It works fine on some devices (like the Dragonboard 845c, but not so much on the Lenovo Yoga C630).
This unfortunately looks like a fluke in firmware development, where likely somewhere in the vast hypervisor stack, a change to accommodate for this was only introduced after the initial software release (which often serves as a baseline for products).
Revert the change to avoid additional guesswork around crashes.
This reverts commit 6b31a9744b8726c69bb0af290f8475a368a4b805.
Weakness: CWE-667
Which versions are affected by CVE-2025-22012?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-22012?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-22012 being exploited?
There is no known exploitation of CVE-2025-22012 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-22012, GHSA-mmrm-hwxf-8j92, UBUNTU-CVE-2025-22012.