CVE-2026-53053 iommu/amd: Fix clone_alias() to use the original device's devid
Incorrect device ID handling in AMD IOMMU alias cloning may propagate stale or wrong DMA translation entries, potentially allowing unauthorized memory access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53053?
CVE-2026-53053 is a high-severity vulnerability in Linux kernel, published on 24 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-681
Which versions are affected by CVE-2026-53053?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53053?
Apply the vendor's patch.
Is CVE-2026-53053 being exploited?
There is no known exploitation of CVE-2026-53053 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-90416, BELL-CVE-2026-53053, DEBIAN-CVE-2026-53053, GHSA-8m6r-f5m5-x7p9, ROOT-OS-DEBIAN-11-CVE-2026-53053, ROOT-OS-DEBIAN-12-CVE-2026-53053 and 3 more.