Kernel crash via unchecked page array index
Published Sep 13, 2022 · Updated Aug 3, 2024
Out-of-bounds access in Imagination Technologies PowerVR GPU drivers on Android SoCs allows local users to crash the kernel via ioctl. An ioctl-controlled ui32PageIndex selects an unchecked entry from psOSPageArrayData->pagearray, whose value page_to_phys converts into a physical address. An untrusted local app must reach the driver ioctl; public evidence demonstrates an out-of-bounds read and crash, but not a controlled kernel write.
Summary
What happened
Out-of-bounds access in Imagination Technologies PowerVR GPU drivers on Android SoCs allows local users to crash the kernel via ioctl. An ioctl-controlled ui32PageIndex selects an unchecked entry from psOSPageArrayData->pagearray, whose value page_to_phys converts into a physical address. An untrusted local app must reach the driver ioctl; public evidence demonstrates an out-of-bounds read and crash, but not a controlled kernel write.
The record
- CVE
- CVE-2021-0942
- Published
- Sep 13, 2022
- Updated
- Aug 3, 2024
- Vendor
- Imagination Technologies
- Product
- PowerVR GPU
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 13, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=Android SoC
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
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Public exploit references
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Technologies
Your stack
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Your stack
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