CVE-2026-43161

medium Red Hat
CVSS v3 Base Score
7.0
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Characteristics
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: May 6, 2026 (8 days ago)
Last Modified: May 6, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in the Linux kernel's Intel IOMMU (Input/Output Memory Management Unit) virtual technology for directed I/O (VT-d) subsystem. When a PCIe (Peripheral Component Interconnect Express) endpoint device, especially when passed through to userspace applications like QEMU or DPDK, unexpectedly loses its connection, the system can experience a hard-lock. This occurs because the IOMMU waits indefinitely for an invalidation request that cannot complete, leading to a Denial of Service (DoS) for the host system.

CWE

CWE-835

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 lore.kernel.org