CVE-2026-64603

System crash via concurrent input-device registration

Published Aug 6, 2026 · Updated Aug 6, 2026

Denial of service in the Linux kernel intel-hid driver allows physically proximate attackers to crash convertible or detachable systems. The notify_handler can run concurrently on multiple CPUs, letting both calls pass the switches check and register the same input device twice. The race requires DMI chassis type 31 or 32 and simultaneous first tablet-mode notifications; the duplicate sysfs entry ends in a NULL-pointer dereference.

CVSS severity4.2
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel intel-hid driver allows physically proximate attackers to crash convertible or detachable systems. The notify_handler can run concurrently on multiple CPUs, letting both calls pass the switches check and register the same input device twice. The race requires DMI chassis type 31 or 32 and simultaneous first tablet-mode notifications; the duplicate sysfs entry ends in a NULL-pointer dereference.

The record

CVE
CVE-2026-64603
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=6.8
  2. Affected versionversion=e2ffcda1629012a2c1a3706432bc45fdc899a584 <86df6499dfd232fbc1c82c0d6eb9322ca67b8cd0
  3. Affected versionversion=e2ffcda1629012a2c1a3706432bc45fdc899a584 <a6402808e552e44e9c26a9fe8395ac11703d5800
  4. Affected versionversion=e2ffcda1629012a2c1a3706432bc45fdc899a584 <c085d82613d5618814b84406c8b2d64f1bc305e7
  5. Affected versionversion=e2ffcda1629012a2c1a3706432bc45fdc899a584 <eace3b3e729d5ba11794d69acfafb58a7950217c

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.8; version=e2ffcda1629012a2c1a3706432bc45fdc899a584 <86df6499dfd232fbc1c82c0d6eb9322ca67b8cd0; version=e2ffcda1629012a2c1a3706432bc45fdc899a584 <a6402808e552e44e9c26a9fe8395ac11703d5800; version=e2ffcda1629012a2c1a3706432bc45fdc899a584 <c085d82613d5618814b84406c8b2d64f1bc305e7; version=e2ffcda1629012a2c1a3706432bc45fdc899a584 <eace3b3e729d5ba11794d69acfafb58a7950217c

Published CVSS scores

4.2Amazon LinuxCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
0.0Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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

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Your stack

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