---
id: CVE-2026-68325
title: 'iommu/amd: Bound the early ACPI HID map'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iommu/amd: Bound the early ACPI HID map

  The ivrs_acpihid command-line parser appends entries to a fixed
  four-element early_acpihid_map array. Unlike the sibling IOAPIC…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db <
    9ae6b1b972ce01d3316c8a5f7f58c8b3668cc6bb
  - >-
    Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db <
    e5e0098f8cd82f8b3c8687a8f686309565d51745
  - >-
    Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db <
    afe7ea0520c49586703f210865ace2d70b017e48
  - >-
    Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db <
    1e31d2394e0db69541b1591d46c5ad6431c81db3
  - >-
    Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db <
    abe5d7962f09adada9c4fb25b816dddd3f97c55d
  - >-
    Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db <
    e5ebe8544df1a1c3611739a8622156094fe470df
  - >-
    Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db <
    030a8e84f8f1b6e96f469c84a13a225c3699910b
  - >-
    Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db <
    fb80117fddb5b477218dc99bb53911b72c3847f8
  - Linux 4.7
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:47:14.631530Z'
published: '2026-08-10'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:55:13.193Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68325'
references:
  - url: 'https://git.kernel.org/stable/c/9ae6b1b972ce01d3316c8a5f7f58c8b3668cc6bb'
  - url: 'https://git.kernel.org/stable/c/e5e0098f8cd82f8b3c8687a8f686309565d51745'
  - url: 'https://git.kernel.org/stable/c/afe7ea0520c49586703f210865ace2d70b017e48'
  - url: 'https://git.kernel.org/stable/c/1e31d2394e0db69541b1591d46c5ad6431c81db3'
  - url: 'https://git.kernel.org/stable/c/abe5d7962f09adada9c4fb25b816dddd3f97c55d'
  - url: 'https://git.kernel.org/stable/c/e5ebe8544df1a1c3611739a8622156094fe470df'
  - url: 'https://git.kernel.org/stable/c/030a8e84f8f1b6e96f469c84a13a225c3699910b'
  - url: 'https://git.kernel.org/stable/c/fb80117fddb5b477218dc99bb53911b72c3847f8'
tags:
  - cve.org
epss: 0.00184
epssPercentile: 0.08087
ingestedAt: '2026-11-06T18:00:12.612Z'
---

## Overview

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

iommu/amd: Bound the early ACPI HID map

The ivrs_acpihid command-line parser appends entries to a fixed
four-element early_acpihid_map array. Unlike the sibling IOAPIC and HPET
parsers, it does not reject a fifth entry before incrementing the map size.

Check the capacity at the common found label before parsing the HID and
UID or writing the entry.

## Affected

- `Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db < 9ae6b1b972ce01d3316c8a5f7f58c8b3668cc6bb`
- `Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db < e5e0098f8cd82f8b3c8687a8f686309565d51745`
- `Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db < afe7ea0520c49586703f210865ace2d70b017e48`
- `Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db < 1e31d2394e0db69541b1591d46c5ad6431c81db3`
- `Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db < abe5d7962f09adada9c4fb25b816dddd3f97c55d`
- `Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db < e5ebe8544df1a1c3611739a8622156094fe470df`
- `Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db < 030a8e84f8f1b6e96f469c84a13a225c3699910b`
- `Linux >= ca3bf5d47cec8b7614bcb2e9132c40081d6d81db < fb80117fddb5b477218dc99bb53911b72c3847f8`
- `Linux 4.7`

## Remediation

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