Skip to content
Heist/ feed
High

iommu: disable SVA when CONFIG_X86 is set

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: iommu: disable SVA when CONFIG_X86 is set Patch series "Fix stale IOTLB entries for kernel address space", v7. This proposes a fix for a security vulnerability related to IOMMU Shared Virtual Addressing (SVA). In an SVA context, an IOMMU can cache kernel page table entries. When a kernel page table page is freed and reallocated for another purpose, the IOMMU might still hold stale, incorrect entries. This can be exploited to cause a use-after-free or write-after-free condition, potentially leading to privilege escalation or data corruption. This solution introduces a deferred freeing mechanism for kernel page table pages, which provides a safe window to notify the IOMMU to invalidate its caches before the page is reused. This patch (of 8): In the IOMMU Shared Virtual Addressing (SVA) context, the IOMMU hardware shares and walks the CPU's page tables. The x86 architecture maps the kernel's virtual address space into the upper portion of every process's page table. Consequently, in an SVA context, the IOMMU hardware can walk and cache kernel page table entries. The Linux kernel currently lacks a notification mechanism for kernel page table changes, specifically when page table pages are freed and reused. The IOMMU driver is only notified of changes to user virtual address mappings. This can cause the IOMMU's internal caches to retain stale entries for kernel VA. Use-After-Free (UAF) and Write-After-Free (WAF) c

Announced Source revision 1
Original source ↗

CVE-2025-71089

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2025-71089

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "26b25a2b98e45aeb40eedcedc586ad5034cbd984",
        "lessThan": "b34289505180a83607fcfdce14b5a290d0528476",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "26b25a2b98e45aeb40eedcedc586ad5034cbd984",
        "lessThan": "7cad37e358970af1bb49030ff01f06a69fa7d985",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "26b25a2b98e45aeb40eedcedc586ad5034cbd984",
        "lessThan": "240cd7f2812cc25496b12063d11c823618f364e9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "26b25a2b98e45aeb40eedcedc586ad5034cbd984",
        "lessThan": "c2c3f1a3fd74ef16cf115f0c558616a13a8471b4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "26b25a2b98e45aeb40eedcedc586ad5034cbd984",
        "lessThan": "c341dee80b5df49a936182341b36395c831c2661",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "26b25a2b98e45aeb40eedcedc586ad5034cbd984",
        "lessThan": "72f98ef9a4be30d2a60136dd6faee376f780d06c",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/iommu/iommu-sva.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.2"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.2",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.200",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.163",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.120",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.64",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.4",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/iommu/iommu-sva.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-71089

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#39145 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement