CVE-2026-64186
kernel: iommu/amd: Remove latent out-of-bounds access in IOMMU debugfs
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 19, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's AMD IOMMU debugfs. Improper handling of user-provided input in the iommu_mmio_write() and iommu_capability_write() functions can lead to an out-of-bounds memory access. This vulnerability could allow a local attacker to potentially cause a denial of service or information disclosure by providing a specially crafted input.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-787 · Out-of-bounds Write