PT-2026-51947 · Linux · Linux

Published 2026-06-24 · Updated 2026-06-24 · CVE-2026-53053

Mitre

In the Linux kernel, the following vulnerability has been resolved:

iommu/amd: Fix clone alias() to use the original device's devid

Currently clone alias() assumes first argument (pdev) is always the original device pointer. This function is called by pci for each dma alias() which based on topology decides to send original or alias device details in first argument.

This meant that the source devid used to look up and copy the DTE may be incorrect, leading to wrong or stale DTE entries being propagated to alias device.

Fix this by passing the original pdev as the opaque data argument to both the direct clone alias() call and pci for each dma alias(). Inside clone alias(), retrieve the original device from data and compute devid from it.

Related Identifiers

CVE-2026-53053

Affected Products

Linux

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-53053 · Security Note
• https://git.kernel.org/stable/c/20b3c566e2702e5d4d0545be8a97029a2eebcc0e · Note
• https://git.kernel.org/stable/c/dae251ff11d2d2208a029f98923756831cefec46 · Note
• https://git.kernel.org/stable/c/dbd76a537d8cb814e7f5b795ab21ecb7949c821d · Note
• https://git.kernel.org/stable/c/faad224fe0f0857a04ff2eb3c90f0de57f47d0f3 · Note