CVE-2026-31572 i2c: designware: amdisp: Fix resume-probe race condition issue
A race condition in the Linux kernel i2c designware driver can cause a NULL pointer dereference, leading to a system 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-2026-31572?
CVE-2026-31572 is a medium-severity vulnerability in Linux kernel, published on 24 Apr 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:
i2c: designware: amdisp: Fix resume-probe race condition issue
Identified resume-probe race condition in kernel v7.0 with the commit 38fa29b01a6a ("i2c: designware: Combine the init functions"),but this issue existed from the beginning though not detected.
The amdisp i2c device requires ISP to be in power-on state for probe to succeed. To meet this requirement, this device is added to genpd to control ISP power using runtime PM. The pm_runtime_get_sync() called before i2c_dw_probe() triggers PM resume, which powers on ISP and also invokes the amdisp i2c runtime resume before the probe completes resulting in this race condition and a NULL dereferencing issue in v7.0
Fix this race condition by using the genpd APIs directly during probe: - Call dev_pm_genpd_resume() to Power ON ISP before probe - Call dev_pm_genpd_suspend() to Power OFF ISP after probe - Set the device to suspended state with pm_runtime_set_suspended() - Enable runtime PM only after the device is fully initialized
Weakness: CWE-362
Which versions are affected by CVE-2026-31572?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31572?
Apply the vendor's patch.
Is CVE-2026-31572 being exploited?
There is no known exploitation of CVE-2026-31572 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-31572, DEBIAN-CVE-2026-31572, GHSA-3jx9-923c-c3x9, UBUNTU-CVE-2026-31572.