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Vulnerability record · CVE-2026-43353 · published 8 May 2026

CVE-2026-43353: Linux kernel race condition vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.13% · top 97.6% CWE-362 · Race condition
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/1dca8aee80eea76d2aae21265de5dd64f6ba0f09 Patch
https://git.kernel.org/stable/c/4faa1e9c67a2229f6749190aedaf88ce0391efd2 Patch
https://git.kernel.org/stable/c/b684b420a5bb0ea1b0e13abfdb8ce41c5266e62e Patch

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Source: NIST National Vulnerability Database (record CVE-2026-43353), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.