CVE-2026-80605

Kernel crash via signed loop-counter overflow

Published Aug 28, 2026 · Updated Aug 28, 2026

NULL pointer dereference in the Linux kernel HID picoLCD driver allows attackers to crash the kernel through an excessive loop count. In picolcd_send_and_wait(), signed counter k wraps after more than INT_MAX report-field iterations, so k < size becomes true at size zero and dereferences raw_data despite its NULL value. The public record does not establish a practical way to force that iteration count; the documented consequence is a theoretical kernel crash.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel HID picoLCD driver allows attackers to crash the kernel through an excessive loop count. In picolcd_send_and_wait(), signed counter k wraps after more than INT_MAX report-field iterations, so k < size becomes true at size zero and dereferences raw_data despite its NULL value. The public record does not establish a practical way to force that iteration count; the documented consequence is a theoretical kernel crash.

The record

CVE
CVE-2026-80605
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=3.7
  2. Affected versionversion=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <0021eb09041f021c079be1022934a280f7f176c0
  3. Affected versionversion=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <42dc0b7b55fe0499fc09183f34a1c46d1dcccf77
  4. Affected versionversion=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <48caee2c106b03301c72fe389ebff00d852c58d5
  5. Affected versionversion=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <a02d5d7ad7ae5fa3756b8332f7350e973085dcb3
  6. Affected versionversion=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <d354e523c6f740db758cafcd4c11bb7913285ed8
  7. Affected versionversion=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <dc176447c7279435c46735db7da81aed1ec25cc2
  8. Affected versionversion=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <e4edeefb8d5bfceb2058e2b3291f4ae1e5a76e61
  9. Affected versionversion=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <ef649703dce0df1364fcec3cdad9b32d1c522939

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.7; version=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <0021eb09041f021c079be1022934a280f7f176c0; version=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <42dc0b7b55fe0499fc09183f34a1c46d1dcccf77; version=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <48caee2c106b03301c72fe389ebff00d852c58d5; version=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <a02d5d7ad7ae5fa3756b8332f7350e973085dcb3; version=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <d354e523c6f740db758cafcd4c11bb7913285ed8; version=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <dc176447c7279435c46735db7da81aed1ec25cc2; version=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <e4edeefb8d5bfceb2058e2b3291f4ae1e5a76e61; version=fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <ef649703dce0df1364fcec3cdad9b32d1c522939

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