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CVE-2026-93039: Linux

7.4

CVSS 3.1

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Атакува се

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Време до експлоатация

Атакува се локално, при специфични условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ASoC: meson: Keep link pointers valid on realloc failure meson_card_reallocate_links() grows the DAI link and private data arrays with two consecutive krealloc() calls and updates the owner pointers only after both calls have succeeded. A successful krealloc() may move the data: it frees the old block and returns a new one. When that happens for the link array and the second krealloc() then fails, card->dai_link still points to the block that krealloc() already freed, and the error path frees the new block too. The probe error path then calls meson_card_clean_references(), which dereferences card->dai_link and kfree()s it again, resulting in a use-after-free and a double free. Commit card->dai_link and card->num_links right after the first krealloc() succeeds, so the pointer always refers to a valid allocation that meson_card_clean_references() can walk and free. krealloc() with __GFP_ZERO zero-initializes the added entries, so walking them on the error path is safe. With both failure paths reduced to a plain return, drop the goto labels and the error message.

    Засегнати продукти

    • Linux Linux: 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b преди de33afc57f24538186bccf4c4f6c65dd38634fd8; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b преди 1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b преди 8db0a0fc84e80aa9924e0833aef6cc95df94e5a7; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b преди 41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b преди 0b30fbe6bf7cf6499b19dd886f466e7c9e820089; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b преди 8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b преди 5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe; 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b преди 2aaa41cf974f83a6fb105422bac4e2f107150774
    • Linux Linux: 4.19; преди 4.19; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; 7.3 до *

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-93039: Linux | freedomonline.bg