iommu/amd: Fix clone_alias() to use the original device's devid
CVE-2026-53053 · published 24 Jun 2026
How serious is it
- Severity: high, CVSS score 8.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-53053?
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Who is affected
- Linux Linux: 3332364e4ebc0581d133a334645a20fd13b580f1 to < 166a08644aa509e5d27e154d7fa774f4181df9e0, 3332364e4ebc0581d133a334645a20fd13b580f1 to < dbd76a537d8cb814e7f5b795ab21ecb7949c821d, 3332364e4ebc0581d133a334645a20fd13b580f1 to < 20b3c566e2702e5d4d0545be8a97029a2eebcc0e, 3332364e4ebc0581d133a334645a20fd13b580f1 to < dae251ff11d2d2208a029f98923756831cefec46
- Linux Linux: 5.5
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
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References
- git.kernel.org/stable/c/166a08644aa509e5d27e154d7fa774f4181df9e0
- git.kernel.org/stable/c/dbd76a537d8cb814e7f5b795ab21ecb7949c821d
- git.kernel.org/stable/c/20b3c566e2702e5d4d0545be8a97029a2eebcc0e
- git.kernel.org/stable/c/dae251ff11d2d2208a029f98923756831cefec46
- git.kernel.org/stable/c/faad224fe0f0857a04ff2eb3c90f0de57f47d0f3
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON