CVE-2026-63916

Kernel memory corruption via wrong HID field

Published Jul 19, 2026 · Updated Jul 19, 2026

Out-of-bounds write in the Linux kernel Wacom HID driver allows physically proximate attackers to corrupt kernel memory via a crafted descriptor. wacom_hid_set_device_mode() uses the HID_DG_INPUTMODE usage index to write field[0] even when the usage belongs to another feature-report field with a larger report count. A malicious USB or spoofed Bluetooth Wacom device triggers the write during automatic probing without a host login, causing a kernel crash or enabling kernel-context code execution.

CVSS severity8.8
High
EPSS probability0.35%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds write in the Linux kernel Wacom HID driver allows physically proximate attackers to corrupt kernel memory via a crafted descriptor. wacom_hid_set_device_mode() uses the HID_DG_INPUTMODE usage index to write field[0] even when the usage belongs to another feature-report field with a larger report count. A malicious USB or spoofed Bluetooth Wacom device triggers the write during automatic probing without a host login, causing a kernel crash or enabling kernel-context code execution.

The record

CVE
CVE-2026-63916
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1200
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.18
  2. Affected versionversion=5ae6e89f7409cb5d218bb728326eba9c650d9700 <2add311d99646c9d235b2c44f9c169ba30f5db3a
  3. Affected versionversion=5ae6e89f7409cb5d218bb728326eba9c650d9700 <43e7c02d6090a82fd60d63491f6871aec906345e
  4. Affected versionversion=5ae6e89f7409cb5d218bb728326eba9c650d9700 <5716a293fb19d382ca2336e08fd28a619a5f3c25
  5. Affected versionversion=5ae6e89f7409cb5d218bb728326eba9c650d9700 <5db3fca0cec7b33bc5379411d0a60d792c9f9bc0
  6. Affected versionversion=5ae6e89f7409cb5d218bb728326eba9c650d9700 <83bd8a5756a3c4a413ed8f6253f9eb2821e1ccaf
  7. Affected versionversion=5ae6e89f7409cb5d218bb728326eba9c650d9700 <b8338111e14183972359009c12d0dbd81d2e1e16
  8. Affected versionversion=5ae6e89f7409cb5d218bb728326eba9c650d9700 <c0a8899e02ddebd51e2589835182c239c2e224ae
  9. Affected versionversion=5ae6e89f7409cb5d218bb728326eba9c650d9700 <ed598de9f61582902406d352d99f2073d8e00298

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.18; version=5ae6e89f7409cb5d218bb728326eba9c650d9700 <2add311d99646c9d235b2c44f9c169ba30f5db3a; version=5ae6e89f7409cb5d218bb728326eba9c650d9700 <43e7c02d6090a82fd60d63491f6871aec906345e; version=5ae6e89f7409cb5d218bb728326eba9c650d9700 <5716a293fb19d382ca2336e08fd28a619a5f3c25; version=5ae6e89f7409cb5d218bb728326eba9c650d9700 <5db3fca0cec7b33bc5379411d0a60d792c9f9bc0; version=5ae6e89f7409cb5d218bb728326eba9c650d9700 <83bd8a5756a3c4a413ed8f6253f9eb2821e1ccaf; version=5ae6e89f7409cb5d218bb728326eba9c650d9700 <b8338111e14183972359009c12d0dbd81d2e1e16; version=5ae6e89f7409cb5d218bb728326eba9c650d9700 <c0a8899e02ddebd51e2589835182c239c2e224ae; version=5ae6e89f7409cb5d218bb728326eba9c650d9700 <ed598de9f61582902406d352d99f2073d8e00298

Published CVSS scores

8.8Linux kernel CNACVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo