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CVE-2026-43076: 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, без вход и след действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate inline data i_size during inode read When reading an inode from disk, ocfs2_validate_inode_block() performs various sanity checks but does not validate the size of inline data. If the filesystem is corrupted, an inode's i_size can exceed the actual inline data capacity (id_count). This causes ocfs2_dir_foreach_blk_id() to iterate beyond the inline data buffer, triggering a use-after-free when accessing directory entries from freed memory. In the syzbot report: - i_size was 1099511627576 bytes (~1TB) - Actual inline data capacity (id_count) is typically <256 bytes - A garbage rec_len (54648) caused ctx->pos to jump out of bounds - This triggered a UAF in ocfs2_check_dir_entry() Fix by adding a validation check in ocfs2_validate_inode_block() to ensure inodes with inline data have i_size <= id_count. This catches the corruption early during inode read and prevents all downstream code from operating on invalid data.

    Засегнати продукти

    • Linux Linux: 23193e513d1cd69411469f028d56fd175d4a6b07 преди d012c782abcabe68b5b9e71be58a15e9f9d83dc1; 23193e513d1cd69411469f028d56fd175d4a6b07 преди bcd46bc261b215b3b12c557a978299eafa02ecdd; 23193e513d1cd69411469f028d56fd175d4a6b07 преди 131c0b573e1b467b7d553e9ff38003f1acd8f5f2; 23193e513d1cd69411469f028d56fd175d4a6b07 преди 37f074e65f24f10f8d8df224a572e4cb9e6faf63; 23193e513d1cd69411469f028d56fd175d4a6b07 преди c1de19e891be3bfb3e1d0c7cf07bbb8fb3b77c1b; 23193e513d1cd69411469f028d56fd175d4a6b07 преди cd2d765aa7157f852999842af32148128c735d39; 23193e513d1cd69411469f028d56fd175d4a6b07 преди 77d0295725109d77f5854ef5b58c0d06c08168cc; 23193e513d1cd69411469f028d56fd175d4a6b07 преди 1524af3685b35feac76662cc551cbc37bd14775f
    • 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-2026-43076: Linux | freedomonline.bg