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CVE-2026-99112: Linux

7.1

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: net/sched: cls_flower: validate mask pointer after nla_next() fl_set_enc_opt() iterates the key's nested tunnel-option attributes with nla_for_each_attr() while advancing a single mask pointer via nla_next() at the bottom of each loop, so the mask cursor is driven by the number of key attributes rather than by the mask's own attributes. The nla_ok() added by commit c96adff956191 ("cls_flower: call nla_ok() before nla_next()") only validates the mask pointer that was just consumed; the pointer produced by nla_next() is used by the next iteration (fl_set_geneve_opt() and siblings) without any validation. The mask's nested attributes are validated with NL_VALIDATE_LIBERAL, which merely warns on trailing bytes that do not form a complete attribute. A mask carrying one valid attribute plus 1-3 residue bytes (or a non-aligned attribute length making msk_depth negative) therefore reaches the next iteration with msk_depth != 0, so neither the !msk_depth check in fl_set_enc_opt() nor the !depth check in the per-type helpers fires. nla_type() then reads past the mask payload and nla_parse_nested_deprecated() iterates with an nla_len taken from those bytes, reading well beyond the mask attribute (KASAN: slab-out-of-bounds read in __nla_validate_parse from fl_change()). Validate the advanced mask pointer as well: when the mask is not legitimately exhausted (msk_depth != 0) and the new pointer fails nla_ok(), reject the filter with -EINVAL. An exactly exhausted mask still skips the check, preserving exact-match behaviour for the remaining key attributes.

    Засегнати продукти

    • Linux Linux: 238b5ebdb6a6e4bc90810b9f8ec0063b3dfda41a преди a9283d006eef7e3b56f0f279a49bb63f6e5e61df; c96adff95619178e2118925578343ad54857c80c преди 497944d534ffb1be300365523030c7c6517cbbb6; c96adff95619178e2118925578343ad54857c80c преди a55d84907337580d91c0d54779d9d4b934633158; c96adff95619178e2118925578343ad54857c80c преди cff9bf34afde46c238189cc6f7690b7e35225df1; c96adff95619178e2118925578343ad54857c80c преди 35354bf67aa0f7bace66ffb614906124ed50d59d; c96adff95619178e2118925578343ad54857c80c преди 45e60747a9db2307929260d9aa9c1c6cbb70ee77; c96adff95619178e2118925578343ad54857c80c преди bb187146c7e5c666874784e4f3fc1bc5126e6e92; c96adff95619178e2118925578343ad54857c80c преди fee10655709c5c597e8e9f722f3035d9ea31ff3a; 5.10.11 преди 5.10.273
    • Linux Linux: 5.11; преди 5.11; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.161 до 6.6.*; 6.12.115 до 6.12.*; 6.18.59 до 6.18.*; 7.2.13 до 7.2.*; от 7.3 нататък

    История

    • 28 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99112: Linux | freedomonline.bg