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CVE-2025-71089: Linux, грешка в паметта

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, при специфични условия, с обикновен потребителски вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката не може да се автоматизира

Описание

Оригинално описание

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) conditions arise when kernel page table pages are freed and later reallocated. The IOMMU could misinterpret the new data as valid page table entries. The IOMMU might then walk into attacker-controlled memory, leading to arbitrary physical memory DMA access or privilege escalation. This is also a Write-After-Free issue, as the IOMMU will potentially continue to write Accessed and Dirty bits to the freed memory while attempting to walk the stale page tables. Currently, SVA conte

Засегнати продукти

  • Linux Linux: 26b25a2b98e45aeb40eedcedc586ad5034cbd984 преди 845875f4c6788c88e2334fe5825934821decbdc8; 26b25a2b98e45aeb40eedcedc586ad5034cbd984 преди b34289505180a83607fcfdce14b5a290d0528476; 26b25a2b98e45aeb40eedcedc586ad5034cbd984 преди 7cad37e358970af1bb49030ff01f06a69fa7d985; 26b25a2b98e45aeb40eedcedc586ad5034cbd984 преди 240cd7f2812cc25496b12063d11c823618f364e9; 26b25a2b98e45aeb40eedcedc586ad5034cbd984 преди c2c3f1a3fd74ef16cf115f0c558616a13a8471b4; 26b25a2b98e45aeb40eedcedc586ad5034cbd984 преди c341dee80b5df49a936182341b36395c831c2661; 26b25a2b98e45aeb40eedcedc586ad5034cbd984 преди 72f98ef9a4be30d2a60136dd6faee376f780d06c
  • Linux Linux: 5.2; преди 5.2; 5.10.273 до 5.10.*; 5.15.200 до 5.15.*; 6.1.163 до 6.1.*; 6.6.120 до 6.6.*; 6.12.64 до 6.12.*; 6.18.4 до 6.18.*; 6.19 до *

Вид слабост

История

  • 13 януари 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2025-71089: Linux, грешка в паметта | freedomonline.bg