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CVE-2026-64095: 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 от съседна мрежа, без особени условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: avoid double decrement of bla.num_requests The bla.num_requests is increased when no request_sent was in progress. And it is decremented in various places (announcement was received, backbone is purged, periodic work). But the check if the request_sent is actually set to a specific state and the atomic_dec/_inc are not safe because they are not atomic (TOCTOU) and multiple such code portions can run concurrently. At the same time, it is necessary to modify request_sent (state) and bla.num_requests atomically. Otherwise batadv_bla_send_request() might set request_sent to 1 and is interrupted. batadv_handle_announce() can then set request_sent back to 0 and decrement num_requests before batadv_bla_send_request() incremented it. The two operations must therefore be locked. And since state (request_sent) and wait_periods are only accessed inside this lock, they can be converted to simpler datatypes. And to avoid that the bla.num_requests is touched by a parallel running context with a valid backbone_gw reference after batadv_bla_purge_backbone_gw() ran, a third state "stopped" is required to correctly signal that a backbone_gw is in the state of being cleaned up.

    Засегнати продукти

    • Linux Linux: 23721387c409087fd3b97e274f34d3ddc0970b74 преди 1f013bc94154f2e78e97d0296175664224c796e0; 23721387c409087fd3b97e274f34d3ddc0970b74 преди 5328b95960774f2e189f22485616bc7b8eb2f7e3; 23721387c409087fd3b97e274f34d3ddc0970b74 преди 8ff9c59d1b7b48c2596878341a5310f32895d52b; 23721387c409087fd3b97e274f34d3ddc0970b74 преди a9393751ecf7e9096f93cb6eed02db4f79125765; 23721387c409087fd3b97e274f34d3ddc0970b74 преди 461f1e3dfb888701895b766446c55db2b10db705; 23721387c409087fd3b97e274f34d3ddc0970b74 преди 45384612f29692fbf0c770200361a7acff90125c; 23721387c409087fd3b97e274f34d3ddc0970b74 преди 65497ad155a3246df177b5ef662cd6e5a32cb470; 23721387c409087fd3b97e274f34d3ddc0970b74 преди 83ab69bd12b80f6ea169c8bea6977701b53a043d
    • Linux Linux: 3.5; преди 3.5; 5.10.259 до 5.10.*; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.143 до 6.6.*; 6.12.93 до 6.12.*; 6.18.34 до 6.18.*; 7.0.11 до 7.0.*; от 7.1 нататък

    История

    • 19 юли 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-64095: Linux | freedomonline.bg