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CVE-2026-72367: Linux

8.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, 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: iomap: guard io_size EOF trim against concurrent truncate underflow iomap: fix zero padding data issue in concurrent append writes changed ioend accounting so that io_size tracks only valid data within EOF. This trims io_size when a writeback range extends past end_pos: ioend->io_size += map_len; if (ioend->io_offset + ioend->io_size > end_pos) ioend->io_size = end_pos - ioend->io_offset; However, if end_pos ends up below ioend->io_offset, the subtraction becomes negative and is stored in size_t io_size, causing an unsigned wrap to a huge value. This can happen when writeback continues past byte-level EOF up to a block-aligned range, or when a concurrent truncate shrinks the file after end_pos was sampled in iomap_writeback_handle_eof(). A wrapped io_size can mislead append detection and corrupt completion-time size handling, since filesystem end_io paths consume io_size for decisions such as on-disk EOF updates and unwritten/COW completion ranges. Fix this by clamping io_size to zero when EOF has moved to or before the ioend start offset. This preserves the original intent of trimming io_size to valid in-EOF data while avoiding the underflow.

    Засегнати продукти

    • Linux Linux: 82c59a86a247a8970d353d10f52a37e5564fb137 преди cc1d6af0bee27d6595908b497424f338161299fc; 51d20d1dacbec589d459e11fc88fbca419f84a99 преди 1f38f65bf965fce9aa159d45c5347538f56c5973; 51d20d1dacbec589d459e11fc88fbca419f84a99 преди 7f7780abb4c0fdc9a2603aea8e985ff14ee900e0; 51d20d1dacbec589d459e11fc88fbca419f84a99 преди 55ec50d046c03b3724741957f7b007856e36dbe7; 6.12.10 преди 6.12.114
    • Linux Linux: 6.13; преди 6.13; 6.12.114 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

    История

    • 15 август 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-72367: Linux | freedomonline.bg