CVE-2026-68325
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.
CSIRTS triage
- What
- The AMD IOMMU driver's early ACPI HID map is unbounded, enabling privilege escalation.
- Who is affected
- Systems with AMD IOMMU using early device initialization.
- Urgency
- Critical severity (CVSS 9.8) and not yet exploited; patch immediately.
- Action
- Update to a patched Linux kernel version that addresses CVE-2026-68325.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all EPSS-scored CVEs.
Advisory coverage (2)
- criticalCVE-2026-68325: iommu/amd: Bound the early ACPI HID mapmsrc · 2026-08-11
- unknownCVE-2026-68325: In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Bound the early…nvd · 2026-08-10
External references
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