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CVE-2026-46280: 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, без особени 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: lib: test_hmm: evict device pages on file close to avoid use-after-free Patch series "Minor hmm_test fixes and cleanups". Two bugfixes a cleanup for the HMM kernel selftests. These were mostly reported by Zenghui Yu with special thanks to Lorenzo for analysing and pointing out the problems. This patch (of 3): When dmirror_fops_release() is called it frees the dmirror struct but doesn't migrate device private pages back to system memory first. This leaves those pages with a dangling zone_device_data pointer to the freed dmirror. If a subsequent fault occurs on those pages (eg. during coredump) the dmirror_devmem_fault() callback dereferences the stale pointer causing a kernel panic. This was reported [1] when running mm/ksft_hmm.sh on arm64, where a test failure triggered SIGABRT and the resulting coredump walked the VMAs faulting in the stale device private pages. Fix this by calling dmirror_device_evict_chunk() for each devmem chunk in dmirror_fops_release() to migrate all device private pages back to system memory before freeing the dmirror struct. The function is moved earlier in the file to avoid a forward declaration.

Засегнати продукти

  • Linux Linux: b2ef9f5a5cb37643ca5def3516c546457074b882 преди 234071b4318feaeb27cd2e4e1b16ef6b055adf89; b2ef9f5a5cb37643ca5def3516c546457074b882 преди bf477abd448c76bb8ea51c9b4f63a3a17c4b6239; b2ef9f5a5cb37643ca5def3516c546457074b882 преди 5846715b6382dd4c6a69b35a56ca6115d33bc2a0; b2ef9f5a5cb37643ca5def3516c546457074b882 преди 38f113f81d3f0adc658a4475dd3ecaec985e21d3; b2ef9f5a5cb37643ca5def3516c546457074b882 преди 9de1eb0aac2862d6144b8db0ec1388e79f8bc3e1; b2ef9f5a5cb37643ca5def3516c546457074b882 преди 744dd97752ef1076a8d8672bb0d8aa2c7abc1144
  • Linux Linux: 5.8; преди 5.8; 6.1.176 до 6.1.*; 6.6.140 до 6.6.*; 6.12.86 до 6.12.*; 6.18.27 до 6.18.*; 7.0.4 до 7.0.*; 7.1 до *

Вид слабост

История

  • 8 юни 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-46280: Linux, грешка в паметта | freedomonline.bg