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CVE-2026-99239: 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, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: refuse __l2cap_chan_add if chan already has conn l2cap_chan may be linked to l2cap_conn at most once. This is assumed in several places, eg l2cap_chan_del cleanup. There is a TOCTOU race where the invariant is violated: [Task 1] [Task 2] l2cap_chan_connect l2cap_sock_bind l2cap_chan_lock lock_sock l2cap_state_change if (sk->sk_state != BT_OPEN) chan->state = BT_CONNECT l2cap_sock_state_change_cb chan->state = BT_BOUND sk->sk_state = BT_BOUND lock_sock <------------------ release_sock sk->sk_state = BT_CONNECT l2cap_sock_connect() does not check sk->sk_state, so since chan->state is now BT_BOUND, subsequent connect() ends up with second __l2cap_chan_add. Explicitly document and check the invariant in __l2cap_chan_add with WARN_ON_ONCE. The only callsite where it could be hit is l2cap_chan_connect, so add pre-check there to avoid relying on chan->state. chan->state read/write is not properly guarded currently so there can be other TOCTOUC problems. Add l2cap_lock_chan in l2cap_sock_bind() to guard chan->state write.

    Засегнати продукти

    • Linux Linux: 8f90405a4a6f1f1880dc07996b47bf57c712bd8a преди 85cc289eb08afa975375f838187369e68b429ee0; 32d783cafb46ff3ca58e6f9fd62c9c5f35eaf26b преди 820579652b24ce277e0097cd65b42bd9b7b8bf07; 8922c7940bae9ce4b1736dddb6362370793835c2 преди e618d928ec7f88cbeadfa3542adcac40f474e629; 91047a4396a8b1857a6f712a90cf33ec0012b189 преди fabaff1c59ff2cc89cb7e5bd0186a5e15f0c73b2; 0b0e2bf39cf99e458d991b9df253727e036a7d7d преди 52fe88e4ef87311eee32b45c65603e7c69e75e7d; d3b739db5dc6f688a60d56da872fabaf65246032 преди 10c705dd706aa93164ba41f2566f15206d6c178e; b66774b48dd98f07254951f74ea6f513efe7ff8b преди 73820561d8cbfd3364a29b8fa77f1707f26029da; b66774b48dd98f07254951f74ea6f513efe7ff8b преди d3afd7803f9bc2a8c4270199497b60158b2fc647; b66774b48dd98f07254951f74ea6f513efe7ff8b преди 86b55991d3cd690e73c5ef8d20b75ae4905b357a; 50c38d9f42a529691e4e67ea9cedf4f0bfc8d277; 5.10.265 преди 5.10.273; 5.15.216 преди 5.15.224; 6.1.183 преди 6.1.191; 6.6.145 преди 6.6.161; 6.12.97 преди 6.12.115; 6.18.39 преди 6.18.60; 7.1.4 преди 7.2
    • Linux Linux: 7.2; преди 7.2; 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.*; 6.18.60 до 6.18.*; 7.2.14 до 7.2.*; 7.3.1 до 7.3.*; от 7.4-rc1 нататък

    История

    • 2 ноември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99239: Linux | freedomonline.bg