Kernel memory read and write via DMA bypass
Published Jun 25, 2026 · Updated Jun 25, 2026
Out-of-bounds DMA access in Linux Kernel 6.19 through 7.0.12 allows local users to read or write memory through Ethos-U ioctls. dma_length() adds a positive stride to an uninitialized U64_MAX length sentinel; size0 equal to 1 makes the value wrap to zero, so ethosu_job.c accepts an empty region before hardware uses stale physical addresses. Access requires a local low-privileged user able to open the accelerator device; successful DMA can disclose or corrupt kernel or cross-process memory and interrupt the system.
Summary
What happened
Out-of-bounds DMA access in Linux Kernel 6.19 through 7.0.12 allows local users to read or write memory through Ethos-U ioctls. dma_length() adds a positive stride to an uninitialized U64_MAX length sentinel; size0 equal to 1 makes the value wrap to zero, so ethosu_job.c accepts an empty region before hardware uses stale physical addresses. Access requires a local low-privileged user able to open the accelerator device; successful DMA can disclose or corrupt kernel or cross-process memory and interrupt the system.
The record
- CVE
- CVE-2026-53170
- Published
- Jun 25, 2026
- Updated
- Jun 25, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 25, 2026CVE publishedPublication date reported by the CVE source.
- Jun 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b <d9d021218162b6c4fe0bdf42b2b340f1aae23a12
- Affected versionversion=5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b <fb25c76a820ca8a547aa478bfb503da0a11494ab
- Affected versionversion=6.19
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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