CVE-2026-68325
Received Received - Intake

Buffer Overflow in Linux Kernel IOMMU AMD Driver

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: kernel.org

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.

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-68325
EUVD
EUVD-2026-55426

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves a flaw in the ivrs_acpihid command-line parser. It allows appending entries to a fixed four-element array without checking capacity, potentially causing a buffer overflow when a fifth entry is added.

Detection Guidance

This vulnerability is specific to the Linux kernel's IOMMU/AMD driver and does not have direct network detection methods. Check kernel logs for ACPI HID parsing errors or unexpected entries in the early_acpihid_map array. Commands like dmesg | grep -i acpi or journalctl -k | grep -i acpi may help identify issues.

Impact Analysis

This vulnerability could lead to system crashes, privilege escalation, or arbitrary code execution if exploited. It may allow attackers to gain control over the affected system by overflowing the array.

Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for this vulnerability. Monitor kernel updates from your distribution and apply them promptly. No additional configuration changes are required beyond the kernel update.

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