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CVE-2026-64031: 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.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: erofs: fix managed cache race for unaligned extents After unaligned compressed extents were introduced, the following race could occur: [Thread 1] [Thread 2] (z_erofs_fill_bio_vec) <handle a Z_EROFS_PREALLOCATED_FOLIO folio> ... filemap_add_folio (1) (z_erofs_bind_cache) <the same folio is found..> .. .. folio_attach_private (2) filemap_add_folio (3) again Since (1) is executed but (2) hasn't been executed yet, it's possible that another thread finds the same managed folio in z_erofs_bind_cache() for a different pcluster and calls filemap_add_folio() again since folio->private is still Z_EROFS_PREALLOCATED_FOLIO. Fix this by explicitly clearing folio->private before making the folio visible in the managed cache so that another pcluster can simply wait on the locked managed folio as what we did for other shared cases [1]. This only impacts unaligned data compression (`-E48bit` with zstd, for example). [1] Commit 9e2f9d34dd12 ("erofs: handle overlapped pclusters out of crafted images properly") was originally introduced to handle crafted overlapped extents, but it addresses unaligned extents as well.

    Засегнати продукти

    • Linux Linux: 722f0fcdb0bb7d12a5c6d9460b9a7de1f735f36d преди 2718cdb6db0fdbe375e61f2980aada27bafb323e; 7361d1e3763baaf7b9349c576137851458ad38d1 преди 425d32d6288d7d845e486af9419bbedccd8c9103; 7361d1e3763baaf7b9349c576137851458ad38d1 преди 038166f873c4caf6e85cfd4ea0c5a5ba297b4e8b; 7361d1e3763baaf7b9349c576137851458ad38d1 преди 649932fc3815eda2f24eb4de4b3a5e94886ee0b9
    • Linux Linux: 6.15; преди 6.15; 6.18.34 до 6.18.*; 7.0.11 до 7.0.*; от 7.1 нататък

    История

    • 19 юли 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-64031: Linux | freedomonline.bg