Input: byd - synchronize timer deletion before freeing private data (CVE-2026-80572) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80572

Input: byd - synchronize timer deletion before freeing private data

Answer in brief

CVE-2026-80572 records a Unknown severity vulnerability in Input: byd - synchronize timer deletion before freeing private data. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=2d5f5611dd0de52e9a52b56391a7049a52184e72 <8dbfd8e32a13e116790780ed0be82b5a05eb9916 \|\| >=2d5f5611dd0de52e9a52b56391a7049a52184e72 <2e509ef60ee41a2da0deb062c262bb530143fb37 \|\| >=2d5f5611dd0de52e9a52b56391a7049a52184e72 <c83e79c0842ed29860648bcce5022ef0ba5001c6	8dbfd8e32a13e116790780ed0be82b5a05eb9916, 2e509ef60ee41a2da0deb062c262bb530143fb37, c83e79c0842ed29860648bcce5022ef0ba5001c6
Linux/Linuxgeneric	4.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 8dbfd8e32a13e116790780ed0be82b5a05eb9916 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: Input: byd - synchronize timer deletion before freeing private data byd_disconnect() uses timer_delete() before freeing the driver's private data. This does not wait for a running byd_clear_touch() callback, which dereferences the private data and its psmouse pointer. A callback racing with disconnect can therefore access the private data after it has been freed. The timer can also still be re-armed by byd_process_byte() while the disconnect is in progress. Use timer_shutdown_sync() before freeing the private data: it waits for a running callback and turns any later re-arm attempt into a no-op.

Quoted source text, attributed separately from HOL analysis.