Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-43161
Published: May 7, 2026
Vulnerability identifier: #VU130568
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43161
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of inaccessible devices in Intel IOMMU dev-iotlb flush logic when releasing or detaching a PCIe endpoint after its link drops. A local user can trigger device release or detachment for an ATS-enabled passed-through PCIe endpoint to cause a denial of service.
The issue occurs when scalable mode is disabled or unsupported, and it can also be triggered after a link fault leaves the endpoint inaccessible without a link-down event.
How to mitigate CVE-2026-43161
Install security update from vendor's repository.