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Advisory severityHigh7.0Vendor: MediumRed Hat Linux

High [CVE-2026-53053] Fix clone_alias to use the original device's devid

This high-severity Red Hat Linux advisory covers CVE-2026-53053 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-53053 Source published Source updated

VulniPulse record published Record updated

CVE-2026-53053
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

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.

A flaw was found in the Linux kernel's IOMMU (Input/Output Memory Management Unit) AMD driver. The `clone_alias()` function incorrectly uses the device ID (devid) when handling alias devices.

This can lead to the propagation of wrong or stale Device Table Entry (DTE) entries to alias devices, potentially impacting system stability or data integrity. Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

Weakness: CWE-694. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.

Affected products named by the advisory: Red Hat package: kernel-rt.

Is CVE-2026-53053 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-53053 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-53053?

Upgrade to a fixed release named by Red Hat:

  • kernel-0:6.12.0-211.50.1.el10_2
  • kernel-rt-0:4.18.0-553.166.1.rt7.507.el8_10
  • kernel-0:4.18.0-553.166.1.el8_10
  • kernel-0:5.14.0-687.47.1.el9_8
  • RHSA-2026:61887
  • RHSA-2026:70403
  • RHSA-2026:70402
  • RHSA-2026:67150

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Fixed versions
  • kernel-0:6.12.0-211.50.1.el10_2
  • kernel-rt-0:4.18.0-553.166.1.rt7.507.el8_10
  • kernel-0:4.18.0-553.166.1.el8_10
  • kernel-0:5.14.0-687.47.1.el9_8
  • RHSA-2026:61887
  • RHSA-2026:70403
  • RHSA-2026:70402
  • RHSA-2026:67150

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Mitigation

Upgrade to a fixed release: kernel-0:6.12.0-211.50.1.el10_2, kernel-rt-0:4.18.0-553.166.1.rt7.507.el8_10, kernel-0:4.18.0-553.166.1.el8_10, kernel-0:5.14.0-687.47.1.el9_8, RHSA-2026:61887, RHSA-2026:70403. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

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