SB20260812193 - Race condition in Linux kernel iommu amd driver

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Main Vulnerability Database SB20260812193

SB20260812193 - Race condition in Linux kernel iommu amd driver

Published: August 12, 2026

Security Bulletin ID SB20260812193
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-68329)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a use-after-free condition.

The vulnerability exists due to a race condition in iommu_completion_wait() in the AMD IOMMU subsystem when handling concurrent command completion waits across multiple CPUs. A local user can trigger concurrent IOMMU command activity to cause a use-after-free condition.

The issue occurs because the code may return without waiting for previously queued commands to complete in hardware, which can leave stale translations in use while related page-table pages are freed.


Remediation

Install update from vendor's website.

References