CVE-2026-93189

Kernel memory corruption via unquiesced HID reports

Published Sep 17, 2026 · Updated Sep 18, 2026

Use-after-free in the HID core of affected Linux kernel releases allows physically proximate attackers to corrupt memory via Bluetooth HID reports. A failed driver probe calls hid_hw_stop() without first quiescing input, so hidraw_disconnect() frees struct hidraw while hidraw_report_event() can still dereference it on another CPU. A malicious Bluetooth HID peripheral needs no Linux account or user action and can obtain kernel read/write primitives or cause a panic.

CVSS severity8.8
High
EPSS probability0.31%
Next 30 days · Oct 18, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the HID core of affected Linux kernel releases allows physically proximate attackers to corrupt memory via Bluetooth HID reports. A failed driver probe calls hid_hw_stop() without first quiescing input, so hidraw_disconnect() frees struct hidraw while hidraw_report_event() can still dereference it on another CPU. A malicious Bluetooth HID peripheral needs no Linux account or user action and can obtain kernel read/write primitives or cause a panic.

The record

CVE
CVE-2026-93189
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1200
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=0 <5.10.270
  2. Affected versionversion=0 <5.15.221
  3. Affected versionversion=0 <6.1.188
  4. Affected versionversion=0 <6.12.110
  5. Affected versionversion=0 <6.18.52
  6. Affected versionversion=0 <6.6.157
  7. Affected versionversion=0 <7.2.6
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <02246d8b462fd9bd90bc7ae7d6cab1acf69bcb87
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0744cb9520aade37e78f69134f3111086158f1d2
  10. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0fecd89f979a8653b9a5b0816570329b7a94a081
  11. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <544ebb25bd58f67e821573412ab7a982b9e02211
  12. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6787f1828f5616f17250e108c0031fb96fd2cfe6
  13. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <92cca302a4eaf65d1b38b3fb600b4ee5eb856a51
  14. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a4bc41504690b7d7064931909874f5b98cd148b6
  15. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c876c437d188911685d8bed645416f2e86bd0354

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0 <5.10.270; version=0 <5.15.221; version=0 <6.1.188; version=0 <6.12.110; version=0 <6.18.52; version=0 <6.6.157; version=0 <7.2.6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <02246d8b462fd9bd90bc7ae7d6cab1acf69bcb87; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0744cb9520aade37e78f69134f3111086158f1d2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0fecd89f979a8653b9a5b0816570329b7a94a081; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <544ebb25bd58f67e821573412ab7a982b9e02211; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6787f1828f5616f17250e108c0031fb96fd2cfe6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <92cca302a4eaf65d1b38b3fb600b4ee5eb856a51; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a4bc41504690b7d7064931909874f5b98cd148b6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c876c437d188911685d8bed645416f2e86bd0354

Published CVSS scores

8.8Linux 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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 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

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