CVE-2026-43352 i3c: mipi-i3c-hci: Correct RING_CTRL_ABORT handling in DMA dequeue
Flawed DMA ring abort logic in the Linux kernel I3C driver can disrupt controller state, potentially causing 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-2026-43352?
CVE-2026-43352 is a high-severity denial of service vulnerability in Linux kernel, published on 8 May 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:
i3c: mipi-i3c-hci: Correct RING_CTRL_ABORT handling in DMA dequeue
The logic used to abort the DMA ring contains several flaws:
1. The driver unconditionally issues a ring abort even when the ring has already stopped. 2. The completion used to wait for abort completion is never re-initialized, resulting in incorrect wait behavior. 3. The abort sequence unintentionally clears RING_CTRL_ENABLE, which resets hardware ring pointers and disrupts the controller state. 4. If the ring is already stopped, the abort operation should be considered successful without attempting further action.
Fix the abort handling by checking whether the ring is running before issuing an abort, re-initializing the completion when needed, ensuring that RING_CTRL_ENABLE remains asserted during abort, and treating an already stopped ring as a successful condition.
Which versions are affected by CVE-2026-43352?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43352?
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-2026-43352 being exploited?
There is no known exploitation of CVE-2026-43352 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-43352, DEBIAN-CVE-2026-43352, GHSA-qwc4-m3m3-3g83, ROOT-OS-DEBIAN-12-CVE-2026-43352, ROOT-OS-DEBIAN-13-CVE-2026-43352, ROOT-OS-UBUNTU-2204-CVE-2026-43352 and 2 more.