---
id: CVE-2026-90120
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing

  In gic_acpi_parse_iaffid() a given MADT GICC entry might not correspond
  to a logical cpu …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing

  In gic_acpi_parse_iaffid() a given MADT GICC entry might not correspond
  to a logical cpu …
severity: high
cvss: 8.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 35866efa52feaf48cc54a0745851a555654e1446 <
    6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69
  - >-
    Linux >= 35866efa52feaf48cc54a0745851a555654e1446 <
    328affc639ce9873a7a0a3fd6b8339f19767529b
  - Linux 7.0
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:42.750'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90120'
references:
  - url: 'https://git.kernel.org/stable/c/328affc639ce9873a7a0a3fd6b8339f19767529b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.002
epssPercentile: 0.08668
ingestedAt: '2026-09-17T16:21:47.884Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing

In gic_acpi_parse_iaffid() a given MADT GICC entry might not correspond
to a logical cpu recognized by the kernel, resulting in the cpu variable
initialization to an error value.

Currently, the get_logical_index() return value is not checked for failure,
which might result in out-of-bounds memory corruption while trying to
index a per_cpu variable array.

Add a check to evaluate get_logical_index() return value.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.