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ReviewHigh

CVE-2026-80572

Linux

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...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.08.27
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

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...

Affected product and versions

Product
Linux
Affected versions
>= 2d5f5611dd0de52e9a52b56391a7049a52184e72 < 84b205297fa15f97510342221d8c9a0119711478, >= 2d5f5611dd0de52e9a52b56391a7049a52184e72 < 28d984a66b9e14be74986167b6ad40b5e0daf19a, >= 2d5f5611dd0de52e9a52b56391a7049a52184e72 < ee944a706a18322b4a2599eebe8040a2994e928f, >= 2d5f5611dd0de52e9a52b56391a7049a52184e72 < 8dbfd8e32a13e116790780ed0be82b5a05eb9916, >= 2d5f5611dd0de52e9a52b56391a7049a52184e72 < 2e509ef60ee41a2da0deb062c262bb530143fb37, >= 2d5f5611dd0de52e9a52b56391a7049a52184e72 < c83e79c0842ed29860648bcce5022ef0ba5001c6, >= 4.6
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available