CVE-2026-89620

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

Published Sep 11, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

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-spi fix.

write_cmd_to_txdma() writes the output report header ahead of the content
in the same buffer, so size the allocation to cover the header as well.
That keeps the added bound from rejecting a maximum-sized report.

Analysis

Technical impact

This vulnerability in the Linux kernel’s HID subsystem allows an attacker to overflow a heap buffer used by the intel‑thc‑hid: intel‑quickspi_FEATURE ioctl with a report larger than the driver’s maximum report length, the kernel copies the attacker‑controlled data into a buffer that is not properly sized, corrupting kernel memory. Such corruption can lead to arbitrary kernel’s control flow.

Affected Systems

All Linux kernel installations that include the intel‑thc‑hid: intel‑quickspi driver are affected. No specific kernel or device release is listed, so any kernel version containing this driver without the patch is potentially vulnerable.

Risk and Exploitability

The CVSS score of 7.8 indicates high severity. The EPSS score of < 1% indicates a low probability of exploitation, and the vulnerability is not currently listed in CISA’s KEV catalog. Based on the description, it is inferred that local access may be required, as the vulnerability involves a kernel buffer overflow triggered by a HID ioctl. The overflow can corrupt kernel memory, potentially enabling privilege escalation or code execution.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`9d8d51735a3af40b722346931a6a1e50227df4b5`	affected	< 6fcefe71aeb524f6e77fe586fe85d873745e917c
`9d8d51735a3af40b722346931a6a1e50227df4b5`	affected	< ee8ad1bb1e96164d51089b1182f1bd5f187e7baa
`9d8d51735a3af40b722346931a6a1e50227df4b5`	affected	< a59cf84441f9a17323c89452cec2bf16724c48a9

Linux

affected

Version	Status	Constraints
`6.14`	affected	—
`0`	unaffected	< 6.14
`6.18.50`	unaffected	≤ 6.18.*
`7.2.4`	unaffected	≤ 7.2.*
`7.3`	unaffected	≤ *

No data.

Vendor Product Versions

Linux

Linux Kernel

Version	Status	Scheme	Platform
`[9d8d51735a3af40b722346931a6a1e50227df4b5,6fcefe71aeb524f6e77fe586fe85d873745e917c)`	affected	code_commit	—
`[9d8d51735a3af40b722346931a6a1e50227df4b5,ee8ad1bb1e96164d51089b1182f1bd5f187e7baa)`	affected	code_commit	—
`[9d8d51735a3af40b722346931a6a1e50227df4b5,a59cf84441f9a17323c89452cec2bf16724c48a9)`	affected	code_commit	—

Linux

Linux Kernel

Version	Status	Scheme	Platform
`6.14`	affected	generic	—
`[0,6.14)`	unaffected	semver	—
`[6.18.50,6.19.0)`	unaffected	semver	—
`[7.2.4,7.3.0)`	unaffected	semver	—
`[7.3-rc1,*]`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Apply the latest kernel update that contains the patch for the intel‑thc‑hid driver when available.
Unload or blacklist the intel‑thc‑hid or intel‑quickspi kernel module to prevent the vulnerable code from loading.
Configure udev or file permissions to restrict access to /dev/hidraw* devices so that only trusted users or privileged processes can issue SET_REPORT or SET_FEATURE ioctls.

Generated by OpenCVE AI on September 15, 2026 at 21:14 UTC.

Tracking

Advisories

Source	ID	Title
Ubuntu USN	USN-9019-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-9020-1	Linux kernel vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.173% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/6fcefe71aeb524f6e77fe586fe85d873745e917c
https://git.kernel.org/stable/c/a59cf84441f9a17323c89452cec2bf16724c48a9
https://git.kernel.org/stable/c/ee8ad1bb1e96164d51089b1182f1bd5f187e7baa
https://nvd.nist.gov/vuln/detail/CVE-2026-89620
https://www.cve.org/CVERecord?id=CVE-2026-89620

History

Sep 13, 2026 6:45 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}`	cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`

Sep 12, 2026 12:15 AM Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-120
References		https://nvd.nist.gov/vuln/detail/CVE-2026-89620 https://www.cve.org/CVERecord?id=CVE-2026-89620
Metrics	threat_severity `None`	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}` threat_severity `Important`

Sep 11, 2026 11:45 PM Description updated. Title updated. First appearance in the feed. Affected versions updated. Affected vendors updated. Added references View changes

Type	Values Removed	Values Added
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-spi fix. write_cmd_to_txdma() writes the output report header ahead of the content in the same buffer, so size the allocation to cover the header as well. That keeps the added bound from rejecting a maximum-sized report.
Title		HID: intel-thc-hid: intel-quickspi: validate report size before copy
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/6fcefe71aeb524f6e77fe586fe85d873745e917c https://git.kernel.org/stable/c/a59cf84441f9a17323c89452cec2bf16724c48a9 https://git.kernel.org/stable/c/ee8ad1bb1e96164d51089b1182f1bd5f187e7baa