CVE-2026-89620

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

HID: intel-thc-hid: intel-quickspi: validate report size before copy

write_cmd_to_txdma() builds an output report in qsdev->report_buf, a heap

buffer allocated in quickspi_alloc_report_buf() to the device-descriptor

derived max_report_len (a few hundred bytes for a touch controller). It

copies the caller-supplied report into that buffer:

memcpy(write_buf->content, report_buf, report_buf_len);

The HID core caps a report at HID_MAX_BUFFER_SIZE (16384) by default, and

quickspi_hid_ll_driver does not set max_buffer_size, so the length reaches

the driver unbounded. A hidraw SET_REPORT/SET_FEATURE ioctl carrying a

report larger than max_report_len therefore overflows report_buf with

attacker-controlled length and content.

Record the report_buf allocation size and reject reports that do not fit

before copying, matching the equivalent guard in the intel-quicki2c

sibling (quicki2c_init_write_buf()) and the hid-goodix

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References