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CVE-2026-90320: 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 external xattr entries when reading metadata ocfs2_validate_xattr_block() checks the xattr block header before the block reaches higher-level xattr users, but it does not verify that a non-indexed block's xh_count and entry offsets fit inside the block. Indexed buckets likewise reach list/get consumers after ECC without an entry-bounds check. Use the flat xattr entry validator for non-indexed external xattr blocks, and use a bucket-specific validator for indexed buckets at metadata read time. The bucket validator keeps the entry array bounded by the first bucket block while checking name/value offsets against the bucket block they target. Reject corrupted external xattr metadata before listxattr() or getxattr() can walk out-of-range entry arrays or name/value offsets. Validation reproduced this kernel report: BUG: KASAN: use-after-free in ocfs2_xattr_list_entries+0xd7/0x190 Read of size 1 at addr ffff88810a654007 by task ocfs2_xattr_lis/630 Call Trace: dump_stack_lvl+0x66/0xa0 print_report+0xce/0x630 kasan_report+0xe0/0x110 ocfs2_xattr_list_entries+0xd7/0x190 ocfs2_listxattr+0x3f6/0x610 listxattr+0x90/0xe0 path_listxattrat+0xed/0x220 do_syscall_64+0x115/0x6a0 entry_SYSCALL_64_after_hwframe+0x77/0x7f

    Засегнати продукти

    • Linux Linux: cf1d6c763fbcb115263114302485ad17e7933d87 преди dc5778dbd0b6c411107a0e37e913a94b3c2f2728; cf1d6c763fbcb115263114302485ad17e7933d87 преди ee4ef26927e967ea699b3f0d7ecf97ce044fbc79; cf1d6c763fbcb115263114302485ad17e7933d87 преди 9f4129b6905b7d638bbc9eb8013c3989cbe30b7e; cf1d6c763fbcb115263114302485ad17e7933d87 преди 2cf82b46d5e43be0dfbaac7fa1073cec2fc1f5e6
    • Linux Linux: 2.6.28; преди 2.6.28; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90320: Linux | freedomonline.bg