CVE-2026-43352: i3c: mipi-i3c-hci: Correct RING_CTRL_ABORT handling in DMA dequeue
In the Linux kernel, the following vulnerability has been resolved:
i3c: mipi-i3c-hci: Correct RINGCTRLABORT 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 RINGCTRLENABLE, 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 RINGCTRLENABLE remains asserted during abort, and treating an already stopped ring as a successful condition.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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ubuntu/linux-nvidia-tegrato a version that resolves this vulnerability.Fixed in 6.8.0-1035.38 - Upgrade
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debian/linuxto a version that resolves this vulnerability.Fixed in 6.19.10-1 - Upgrade
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debian/linuxto a version that resolves this vulnerability.Fixed in 7.2.12-1Fixed in 7.2.14-1 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 6.1.191 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 6.6.160 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 6.12.114 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 6.18.19 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 6.19.9
Event History
Frequently Asked Questions
What is the severity of CVE-2026-43352?
CVE-2026-43352 is classified as a vulnerability that could affect the stability of the Linux kernel's mipi-i3c-hci driver.
How do I fix CVE-2026-43352?
To fix CVE-2026-43352, update the Linux kernel to the latest version where the vulnerability has been patched.
What types of attacks could CVE-2026-43352 facilitate?
CVE-2026-43352 could potentially allow for denial-of-service attacks due to improper handling within the DMA dequeue logic.
Which versions of the Linux kernel are affected by CVE-2026-43352?
The specific versions of the Linux kernel that are affected by CVE-2026-43352 are those using the mipi-i3c-hci driver prior to the patch.
Is CVE-2026-43352 exploitable remotely?
CVE-2026-43352 typically requires local access to exploit, making remote exploitation unlikely.