SB20260727305 - Out-of-bounds write in Linux kernel input touchscreen driver

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Main Vulnerability Database SB20260727305

SB20260727305 - Out-of-bounds write in Linux kernel input touchscreen driver

Published: July 27, 2026

Security Bulletin ID SB20260727305
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Physical access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-64271)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 5.2 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an attacker with physical access to overwrite heap memory.

The vulnerability exists due to out-of-bounds write in the tw_interrupt() handler in drivers/input/touchscreen/touchwin.c when processing serial input from a Touchwindow peripheral. An attacker with physical access can send crafted non-zero bytes with mismatched second and third packet bytes to overwrite heap memory.

Exploitation requires a malicious, malfunctioning, or counterfeit Touchwindow peripheral.


Remediation

Install update from vendor's website.

References