iommu: disable SVA when CONFIG_X86 is set
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
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