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CVE-2026-43075: 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: ocfs2: fix out-of-bounds write in ocfs2_write_end_inline KASAN reports a use-after-free write of 4086 bytes in ocfs2_write_end_inline, called from ocfs2_write_end_nolock during a copy_file_range splice fallback on a corrupted ocfs2 filesystem mounted on a loop device. The actual bug is an out-of-bounds write past the inode block buffer, not a true use-after-free. The write overflows into an adjacent freed page, which KASAN reports as UAF. The root cause is that ocfs2_try_to_write_inline_data trusts the on-disk id_count field to determine whether a write fits in inline data. On a corrupted filesystem, id_count can exceed the physical maximum inline data capacity, causing writes to overflow the inode block buffer. Call trace (crash path): vfs_copy_file_range (fs/read_write.c:1634) do_splice_direct splice_direct_to_actor iter_file_splice_write ocfs2_file_write_iter generic_perform_write ocfs2_write_end ocfs2_write_end_nolock (fs/ocfs2/aops.c:1949) ocfs2_write_end_inline (fs/ocfs2/aops.c:1915) memcpy_from_folio <-- KASAN: write OOB So add id_count upper bound check in ocfs2_validate_inode_block() to alongside the existing i_size check to fix it.

    Засегнати продукти

    • Linux Linux: 1afc32b952335f665327a1a9001ba1b44bb76fd9 преди 68f9cc3bbf2ae501770cea7dc0005fc9a85e48ea; 1afc32b952335f665327a1a9001ba1b44bb76fd9 преди 2e6a254f9cedf51b75cc20b8b92e2209bfa04c3e; 1afc32b952335f665327a1a9001ba1b44bb76fd9 преди 22df7d4de9c5cd42edf855a1de25f2106088c4c6; 1afc32b952335f665327a1a9001ba1b44bb76fd9 преди e2c9dc6b6e96f3585f2a1062ca3374a52db0938f; 1afc32b952335f665327a1a9001ba1b44bb76fd9 преди 947f953978b0d9463498d548d0f054f5a75be2e9; 1afc32b952335f665327a1a9001ba1b44bb76fd9 преди 0c1af902223b6fcedb60904ca0b551254686c7b9; 1afc32b952335f665327a1a9001ba1b44bb76fd9 преди 69d3c69ade1e4285ab4ca48fe7acee0767e65604; 1afc32b952335f665327a1a9001ba1b44bb76fd9 преди 7bc5da4842bed3252d26e742213741a4d0ac1b14
    • Linux Linux: 2.6.24; преди 2.6.24; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.136 до 6.6.*; 6.12.83 до 6.12.*; 6.18.24 до 6.18.*; 6.19.14 до 6.19.*; от 7.0 нататък

    История

    • 6 май 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-43075: Linux | freedomonline.bg