SB20260918191 - Out-of-bounds read in Linux kernel acpi driver

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Main Vulnerability Database SB20260918191

SB20260918191 - Out-of-bounds read in Linux kernel acpi driver

Published: September 18, 2026

Security Bulletin ID SB20260918191
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

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-2026-92522)

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

CVSSv4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to read out-of-bounds memory.

The vulnerability exists due to improper bounds validation in the ACPI IOAPIC hotplug lookup when parsing MADT and _MAT records. A local privileged user can provide a malformed record with a truncated header, an oversized declared length, or an incomplete IOAPIC body to read out-of-bounds memory.

Only builds with CONFIG_ACPI_HOTPLUG_IOAPIC enabled include the affected code.


Remediation

Install update from vendor's website.

References