CVE-2026-89729

Kernel memory corruption via oversized HID feature fields

Published Sep 11, 2026 · Updated Sep 11, 2026

An out-of-bounds write in the Linux kernel allows physically proximate attackers to corrupt memory through a malicious HID descriptor. sensor_hub_get_feature copies each report value using a descriptor-controlled field size without limiting each memcpy to the caller's remaining buffer. A malicious USB or Bluetooth HID sensor needs no local privileges; the overwrite can crash the kernel, while an over-read can expose slab bytes through sysfs.

CVSS severityUnavailable
Unscored
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in the Linux kernel allows physically proximate attackers to corrupt memory through a malicious HID descriptor. sensor_hub_get_feature copies each report value using a descriptor-controlled field size without limiting each memcpy to the caller's remaining buffer. A malicious USB or Bluetooth HID sensor needs no local privileges; the overwrite can crash the kernel, while an over-read can expose slab bytes through sysfs.

The record

CVE
CVE-2026-89729
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=4.9
  2. Affected versionversion=5459ada2b3cd69e6bf1b0c034feb810975d0072b <9f43499ce6458a572b781f6bb46c464ab59fa825
  3. Affected versionversion=5459ada2b3cd69e6bf1b0c034feb810975d0072b <bc3d72c44bff17688dc5f3e5132a53b51dae0f04
  4. Affected versionversion=5459ada2b3cd69e6bf1b0c034feb810975d0072b <c92693f3ed099401d0383ef35ca1fe1e6ba033de
  5. Affected versionversion=5459ada2b3cd69e6bf1b0c034feb810975d0072b <fa95b14198b6c8ea721b4784f466d3c2c2bac83a

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.9; version=5459ada2b3cd69e6bf1b0c034feb810975d0072b <9f43499ce6458a572b781f6bb46c464ab59fa825; version=5459ada2b3cd69e6bf1b0c034feb810975d0072b <bc3d72c44bff17688dc5f3e5132a53b51dae0f04; version=5459ada2b3cd69e6bf1b0c034feb810975d0072b <c92693f3ed099401d0383ef35ca1fe1e6ba033de; version=5459ada2b3cd69e6bf1b0c034feb810975d0072b <fa95b14198b6c8ea721b4784f466d3c2c2bac83a

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
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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Your stack

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