CVE-2026-68325 iommu/amd: Bound the early ACPI HID map
A buffer overflow in the Linux kernel's AMD IOMMU driver allows local attackers with boot parameter control to cause memory corruption, leading to privilege escalation or system crashes.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68325?
CVE-2026-68325 is a memory corruption vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-68325?
How do I fix CVE-2026-68325?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-68325 being exploited?
There is no known exploitation of CVE-2026-68325 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68325, DEBIAN-CVE-2026-68325, GHSA-47v4-5f4v-xmxq, UBUNTU-CVE-2026-68325.