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CVE-2026-74312: Linux

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, без особени условия, с обикновен потребителски вход и без действие от потребителя.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: vhost/vdpa: validate virtqueue index in mmap and fault paths vhost_vdpa_mmap() and vhost_vdpa_fault() use vma->vm_pgoff as a virtqueue index for get_vq_notification(), but they do not validate that the index is smaller than v->nvqs. The ioctl path already performs both a bounds check and array_index_nospec(), but the mmap/fault path only checks that the index fits in u16. This allows an out-of-range queue index to reach driver-specific get_vq_notification() callbacks. Fix this by extracting a unified vhost_vdpa_get_vq_notification() helper that validates the queue index against v->nvqs and applies array_index_nospec() before calling the driver callback. Both the mmap and fault paths use this helper, and the bounds checking is consolidated into a single location. From source inspection, the most defensible impact is out-of-bounds access in the callback path, potentially leading to invalid PFN remaps and crash/DoS.

Засегнати продукти

  • Linux Linux: ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 преди 0f310bac6db9bd3bb1655707d692d9d2a86eeb17; ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 преди 4bf5a51963ff816f7443702dc536b9327cf5e550; ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 преди 55a644031e610ea93fbde2702c7b8f267476552f; ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 преди 2b3f79b90b231a682315fe2191bb71925650e183; ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 преди bbba4f92515238d76018e9b75e41b16d83df52c8; ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 преди 1f5f94c6c6b2e4eaa5b45815509e21d0c6cfa81e; ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 преди 32ac9097aa2463fcfc12f61cc4a9ebc3579cba7d; ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 преди 929e4f044621c8cc30b612fb74e1410bef09e41b
  • Linux Linux: 5.8; преди 5.8; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74312: Linux | freedomonline.bg