Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-53164
Published: June 26, 2026
Vulnerability identifier: #VU135628
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-2026-53164
CWE-ID: CWE-670
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 a zero-length mapping and incorrect error unwind logic in iommu_dma_iova_link_swiotlb() when processing unaligned swiotlb mappings. A local user can trigger unaligned memory mappings to corrupt the mapping state and cause a denial of service.
This can be triggered by certain thunderbolt NVMe drives using forced SWIOTLB with oddly aligned buffers for passthrough commands from smartctl.
How to mitigate CVE-2026-53164
Install security update from vendor's repository.