CVE-2026-68325: iommu/amd: Bound the early ACPI HID map

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-10 · updated 2026-08-19

Description

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 products

Linux kernel: 4.7 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/030a8e84f8f1b6e96f469c84a13a225c3699910b
https://git.kernel.org/stable/c/1e31d2394e0db69541b1591d46c5ad6431c81db3
https://git.kernel.org/stable/c/9ae6b1b972ce01d3316c8a5f7f58c8b3668cc6bb
https://git.kernel.org/stable/c/abe5d7962f09adada9c4fb25b816dddd3f97c55d
https://git.kernel.org/stable/c/afe7ea0520c49586703f210865ace2d70b017e48
https://git.kernel.org/stable/c/e5e0098f8cd82f8b3c8687a8f686309565d51745
https://git.kernel.org/stable/c/e5ebe8544df1a1c3611739a8622156094fe470df
https://git.kernel.org/stable/c/fb80117fddb5b477218dc99bb53911b72c3847f8

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