CVE-2026-89628

Kernel memory disclosure via unchecked device length

Published Sep 11, 2026 · Updated Sep 11, 2026

Out-of-bounds read in the Linux kernel picolcd HID driver allows physically proximate attackers with root access to disclose kernel memory. picolcd_debug_eeprom_read() trusts a device-supplied REPORT_EE_DATA length and copies past raw_data[] without bounding it to resp->raw_size. Exploitation requires a crafted or spoofed picoLCD and a root read of the debugfs eeprom file, exposing adjacent slab memory without reported modification or service interruption.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux kernel picolcd HID driver allows physically proximate attackers with root access to disclose kernel memory. picolcd_debug_eeprom_read() trusts a device-supplied REPORT_EE_DATA length and copies past raw_data[] without bounding it to resp->raw_size. Exploitation requires a crafted or spoofed picoLCD and a root read of the debugfs eeprom file, exposing adjacent slab memory without reported modification or service interruption.

The record

CVE
CVE-2026-89628
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1200
Attack vector
physical
Privileges
admin

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=2.6.35
  2. Affected versionversion=9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba <471f4a939c66d1d44aece2321807abf609fc9098
  3. Affected versionversion=9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba <699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84
  4. Affected versionversion=9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba <a3e6e8d7198a9f3861861520a38b673684a1062b
  5. Affected versionversion=9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba <e9c667395ac1f8024f623250b32bae4c7af9caa0

What conditions does exploitation require?

Attack vectorphysical
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.35; version=9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba <471f4a939c66d1d44aece2321807abf609fc9098; version=9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba <699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84; version=9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba <a3e6e8d7198a9f3861861520a38b673684a1062b; version=9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba <e9c667395ac1f8024f623250b32bae4c7af9caa0

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.

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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
Privilegesadmin
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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