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CVE-2026-89684: Linux

7.5

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 по мрежата, без особени условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: nfsd: fix cpntf publish race in nfs4_init_cp_state nfs4_alloc_init_cpntf_state() published the new cpntf entry into the s2s_cp_stateids IDR (with cs_type set) in one s2s_cp_lock section, then took the lock again to list_add() it onto p_stid->sc_cp_list. In the gap the entry is reachable by so_id but cp_list is still {NULL,NULL} from kzalloc. A racing OFFLOAD_CANCEL (so_id is echoed to the client as cnr_stateid, so any NFSv4.2 client can drive it) reaches manage_cpntf_state() -> _free_cpntf_state_locked() and does list_del() on the zeroed list_head, oopsing the server. Fold the cs_type assignment and the list_add() into the same critical section as idr_alloc_cyclic(), so a concurrent lookup either misses the entry or sees a fully linked cp_list. INIT_LIST_HEAD() the entry after allocation and switch _free_cpntf_state_locked() to list_del_init() so a stale unlink is a no-op. nfs4_init_copy_state() passes NULL p_stid and skips the list_add, preserving NFS4_COPY_STID semantics.

    Засегнати продукти

    • Linux Linux: 624322f1adc58acd0b69f77a6ddc764207e97241 преди 63e18fc65587fd3f7b4c6d70e96d32fc41d82ba3; 624322f1adc58acd0b69f77a6ddc764207e97241 преди 6ac469a274e3c7d87fc46ba46d83b95009680407; 624322f1adc58acd0b69f77a6ddc764207e97241 преди 8eeca993357a0bc35aaefebfd7462ac7b0a21d9a; 624322f1adc58acd0b69f77a6ddc764207e97241 преди bfeac42d9074e539bacd1898dd8c14b7f5776620; 624322f1adc58acd0b69f77a6ddc764207e97241 преди 21d6c5957f5ca97d7352e60f55ea412beb9419f5; 624322f1adc58acd0b69f77a6ddc764207e97241 преди a631a26a8777bb235eabd478bbbaf26a4db750bf; 624322f1adc58acd0b69f77a6ddc764207e97241 преди c7270f62e7a05a2ee68aa2b74262b658a14463bd; 624322f1adc58acd0b69f77a6ddc764207e97241 преди be3a5c1d857b0dcbc11796cea603ef25834f75b2
    • Linux Linux: 5.6; преди 5.6; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

    История

    • 11 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89684: Linux | freedomonline.bg