SB2026082771 - Out-of-bounds read in Linux kernel input touchscreen driver

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Main Vulnerability Database SB2026082771

SB2026082771 - Out-of-bounds read in Linux kernel input touchscreen driver

Published: August 27, 2026

Security Bulletin ID SB2026082771
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-80566)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in the hynitron_cstxxx touchscreen driver when parsing touch controller reports. A local user can provide crafted touch data with an invalid touch count or finger ID to cause a denial of service.

The issue can corrupt the touch state of a previously active slot, and on the V821 Avaota F1 board a finger ID of 1 is already invalid because the driver is configured with a single touch slot.


Remediation

Install update from vendor's website.

References