CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: mm/migrate_device: avoid out-of-bounds writes for compound folios migrate_device_range() and migrate_device_pfns() clear the entries following a compound folio so that the PFN arrays retain their page-granular representation. If a compound folio extends beyond the end of the caller-provided range, the loops clear all following folio entries without limiting them to the number of slots remaining in the npages-sized array, causing an out-of-bounds write. Do not proceed with a compound folio if its page-granular representation does not fit entirely in the remaining PFN array. If this happens, drop any reference and lock acquired for the folio, clear the remaining entries, and stop collecting. Observed with a KASAN x86 QEMU kernel using the HMM migrate_anon_huge_zero selftest. Closing /dev/hmm_dmirror0 after migrating an anonymous huge page to device memory exercises: dmirror_fops_release() -> dmirror_device_evict_chunk() -> migrate_device_range()
Засегнати продукти
- Linux Linux: a30b48bf1b244f11bf9b6d20cdccfe0c2264130c преди 99186b185c245f5987d7f8715d5504c8d8cc04a0; a30b48bf1b244f11bf9b6d20cdccfe0c2264130c преди dc41e961a269f2ca4196e669d6d8e05480899cd4
- Linux Linux: 6.19; преди 6.19; 7.2.5 до 7.2.*; от 7.3 нататък
История
- 16 септември 2026 Публикувано