CVE-2026-43353

Summary

In the Linux kernel, the following vulnerability has been resolved: i3c: mipi-i3c-hci: Fix race in DMA ring dequeue The HCI DMA dequeue path (hci_dma_dequeue_xfer()) may be invoked for multiple transfers that timeout around the same time. However, the function is not serialized and can race with itself. When a timeout occurs, hci_dma_dequeue_xfer() stops the ring, processes incomplete transfers, and then restarts the ring. If another timeout triggers a parallel call into the same function, the two instances may interfere with each other - stopping or restarting the ring at unexpected times. Add a mutex so that hci_dma_dequeue_xfer() is serialized with respect to itself.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/1dca8aee80eea76d2aae21265de5dd64f6ba0f09 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/1dca8aee80eea76d2aae21265de5dd64f6ba0f09Patch
• https://git.kernel.org/stable/c/4faa1e9c67a2229f6749190aedaf88ce0391efd2Patch
• https://git.kernel.org/stable/c/b684b420a5bb0ea1b0e13abfdb8ce41c5266e62ePatch
• https://git.kernel.org/stable/c/16061383a9def977e4be908c7dcede9a8a4227fd
• https://git.kernel.org/stable/c/73bb6b15f1fd71479ed12b314876f3ce5935b80a
• https://git.kernel.org/stable/c/d2fa9b855c7b42b34b2fb32731bf533952370384