SB20260626201 - Out-of-bounds write in Linux kernel modules hdcp driver

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Main Vulnerability Database SB20260626201

SB20260626201 - Out-of-bounds write in Linux kernel modules hdcp driver

Published: June 26, 2026

Security Bulletin ID SB20260626201
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Physical access
Highest impact Denial of service

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-2026-53137)

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

CVSSv4: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows an attacker with physical access to cause a denial of service.

The vulnerability exists due to an out-of-bounds write in mod_hdcp_read_rx_id_list() when processing a malicious HDMI HDCP 2.x repeater ReceiverID list over I2C. An attacker with physical access can provide a malicious HDMI repeater that advertises an oversized message length to cause a denial of service.

The issue occurs during HDCP 2.x repeater authentication over HDMI.


Remediation

Install update from vendor's website.

References