CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: iomap: fix out-of-bounds bitmap_set() with zero-length range ifs_set_range_dirty() and ifs_set_range_uptodate() compute last_blk as (off + len - 1) >> i_blkbits. When off is 0 and len is 0, the unsigned subtraction underflows to SIZE_MAX, producing a huge last_blk and nr_blks value that causes bitmap_set() to write far beyond the ifs->state allocation. Regarding ifs_set_range_uptodate(), it is temporarily safe because len cannot be passed in as 0. However, for ifs_set_range_dirty() this is reachable from __iomap_write_end(): when copy_folio_from_iter_atomic() returns 0 (e.g. user buffer fault) and the folio is already uptodate, the guard at the top of __iomap_write_end() does not trigger because !folio_test_uptodate() is false, and iomap_set_range_dirty() is called with copied == 0. Add a !len guard to both functions before the computation, so that a zero-length range is a no-op.
Засегнати продукти
- Linux Linux: 4ce02c67972211be488408c275c8fbf19faf29b3 преди 48829622212f6b8f49155889aecc818ba28ba680; 4ce02c67972211be488408c275c8fbf19faf29b3 преди fb4fad9105c88b1d82f1b3c39e3b6abea8249af6; 4ce02c67972211be488408c275c8fbf19faf29b3 преди 7037e7bdcd26f46c080b8ce307dee5cb471c4b7c; 4ce02c67972211be488408c275c8fbf19faf29b3 преди c5b6a48a8a716a7730e39af1cad083dc4ec955ce; 4ce02c67972211be488408c275c8fbf19faf29b3 преди 9c7d8f7c8994c790fca501dc45ce66e7356cbe05
- Linux Linux: 6.6; преди 6.6; 6.6.153 до 6.6.*; 6.12.101 до 6.12.*; 6.18.42 до 6.18.*; 7.1.6 до 7.1.*; от 7.2 нататък
Вид слабост
История
- 10 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-68145
- https://nvd.nist.gov/vuln/detail/CVE-2026-68145
- https://git.kernel.org/stable/c/48829622212f6b8f49155889aecc818ba28ba680
- https://git.kernel.org/stable/c/fb4fad9105c88b1d82f1b3c39e3b6abea8249af6
- https://git.kernel.org/stable/c/7037e7bdcd26f46c080b8ce307dee5cb471c4b7c
- https://git.kernel.org/stable/c/c5b6a48a8a716a7730e39af1cad083dc4ec955ce
- https://git.kernel.org/stable/c/9c7d8f7c8994c790fca501dc45ce66e7356cbe05