CVE-2026-53053

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3332364e4ebc0581d133a334645a20fd13b580f1 < dbd76a537d8cb814e7f5b795ab21ecb7949c821daffected
LinuxLinux3332364e4ebc0581d133a334645a20fd13b580f1 < 20b3c566e2702e5d4d0545be8a97029a2eebcc0eaffected
LinuxLinux3332364e4ebc0581d133a334645a20fd13b580f1 < dae251ff11d2d2208a029f98923756831cefec46affected
LinuxLinux3332364e4ebc0581d133a334645a20fd13b580f1 < faad224fe0f0857a04ff2eb3c90f0de57f47d0f3affected
LinuxLinux1f03a258f20f1699ede29bb40804074db9398a0daffected
LinuxLinux5.4.17 < 5.5affected
LinuxLinux5.5affected
LinuxLinux0 < 5.5unaffected
LinuxLinux6.12.91 <= 6.12.*unaffected
LinuxLinux6.18.33 <= 6.18.*unaffected
LinuxLinux7.0.10 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References