SB20260816401 - Out-of-bounds read in Linux kernel char tpm driver

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Main Vulnerability Database SB20260816401

SB20260816401 - Out-of-bounds read in Linux kernel char tpm driver

Published: August 16, 2026

Security Bulletin ID SB20260816401
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

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-2026-72135)

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

CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to disclose sensitive information and corrupt kernel memory.

The vulnerability exists due to an out-of-bounds read and out-of-bounds write in the TPM character device read path when processing positional read operations with a pending response. A local user can issue a crafted pread request with a large offset to disclose sensitive information and corrupt kernel memory.

The issue affects the sequential command/response TPM device interface after a command has left a response pending.


Remediation

Install update from vendor's website.

References