Out-of-bounds access via unchecked endpoint index
Published Mar 15, 2022 · Updated Aug 3, 2024
Improper index validation in the Linux kernel before 5.16.12 allows attackers to trigger out-of-bounds access through USB requests. The xudc_getstatus and xudc_set_clear_feature paths derive an endpoint number from setup.wIndex and dereference the endpoint array without first enforcing XUSB_MAX_ENDPOINTS. Exploitation requires a host capable of sending endpoint control requests to a device using the Xilinx USB gadget controller; public records do not establish whether the access causes a crash, memory disclosure, or memory modification.
Summary
What happened
Improper index validation in the Linux kernel before 5.16.12 allows attackers to trigger out-of-bounds access through USB requests. The xudc_getstatus and xudc_set_clear_feature paths derive an endpoint number from setup.wIndex and dereference the endpoint array without first enforcing XUSB_MAX_ENDPOINTS. Exploitation requires a host capable of sending endpoint control requests to a device using the Xilinx USB gadget controller; public records do not establish whether the access causes a crash, memory disclosure, or memory modification.
The record
- CVE
- CVE-2022-27223
- Published
- Mar 15, 2022
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-129
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Mar 15, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
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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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