AZL-100644
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-100644.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-100644
- Upstream
- Published
- 2026-09-11T20:19:47Z
- Modified
- 2026-09-13T06:06:36Z
- Summary
- CVE-2026-89621 affecting package kernel 6.6.150.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
HID: mcp2221: validate report size in mcp2221_raw_event()
mcp2221_raw_event() never validates the size of incoming HID reports. In the MCP2221_I2C_GET_DATA path it trusts the device-supplied data[3] as the copy length without checking that 4 + data[3] bytes actually exist in the received report. A malicious or misbehaving USB device can send a short report with a large data[3], causing the memcpy to read past the valid report data in the HID transfer buffer and leak uninitialized kernel memory back to userspace through the I2C/SMBus read path.
Add a minimum size check at entry and validate that the source range fits within the received report before the copy.
- References