Controller disruption via unsafe DMA ring abort
Published May 8, 2026 · Updated May 8, 2026
DMA ring state corruption in affected Linux Kernel releases allows local users to disrupt I3C controller state through transfer aborts. The hci_dma_dequeue_xfer path aborts an already stopped ring, waits on a stale completion, and clears RING_CTRL_ENABLE, resetting hardware pointers. Local low-privilege access to an exposed I2C/I3C transfer interface is required; repeated timeout-triggering transfers expose stale memory to DMA and can hang devices or crash the kernel.
Summary
What happened
DMA ring state corruption in affected Linux Kernel releases allows local users to disrupt I3C controller state through transfer aborts. The hci_dma_dequeue_xfer path aborts an already stopped ring, waits on a stale completion, and clears RING_CTRL_ENABLE, resetting hardware pointers. Local low-privilege access to an exposed I2C/I3C transfer interface is required; repeated timeout-triggering transfers expose stale memory to DMA and can hang devices or crash the kernel.
The record
- CVE
- CVE-2026-43352
- Published
- May 8, 2026
- Updated
- May 8, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 8, 2026CVE publishedPublication date reported by the CVE source.
- May 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.11
- Affected versionversion=9ad9a52cce2828d932ae9495181e3d6414f72c07 <003df94bcc9227e8e930abd03ac7f63ac10033dc
- Affected versionversion=9ad9a52cce2828d932ae9495181e3d6414f72c07 <5549611888f5ca2db5e8e692b57f30626ddf9898
- Affected versionversion=9ad9a52cce2828d932ae9495181e3d6414f72c07 <b795e68bf3073d67bebbb5a44d93f49efc5b8cc7
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo