CVE-2026-93068 drm/amd/display: Fix DM I2C teardown race
A race condition in the AMD display driver allows local attackers to trigger a kernel NULL pointer dereference and system crash during device removal.
- 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-2026-93068?
CVE-2026-93068 is a vulnerability in Linux, published on 17 Sep 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:
drm/amd/display: Fix DM I2C teardown race
DM I2C adapters can remain visible to userspace while DM teardown is already in progress. A concurrent i2c-dev transfer may then enter amdgpu_dm_i2c_xfer() after the backing DM state has been torn down, leading to a NULL pointer dereference.
Create a devres group around the DM I2C adapter lifetime and release it at the start of dm_hw_fini(), before HPD, IRQ, and DM state are torn down. This removes the I2C adapters first and waits for in-flight users to drain before the structures used by amdgpu_dm_i2c_xfer() disappear.
This fixes a teardown ordering race seen during device removal:
BUG: kernel NULL pointer dereference RIP: amdgpu_dm_i2c_xfer+0x122/0x1c0 [amdgpu] Call Trace: __i2c_transfer i2c_transfer i2cdev_ioctl_rdwr
Which versions are affected by CVE-2026-93068?
How do I fix CVE-2026-93068?
Apply the vendor's patch.
Is CVE-2026-93068 being exploited?
There is no known exploitation of CVE-2026-93068 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-93068, DEBIAN-CVE-2026-93068, GHSA-qm88-w7fg-5vv2, UBUNTU-CVE-2026-93068.