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CVE-2026-93084: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Drop handle on protocol bind failures The SCMI bus notifier acquires an SCMI handle when the driver core emits BUS_NOTIFY_BIND_DRIVER, before invoking the protocol driver probe callback. The protocol probe path only checks whether sdev->handle is set. If device_link_add() fails after the handle has been acquired, the protocol device can still bind with a valid handle but without the dependency link to the SCMI parent. A concurrent parent unbind can then miss the child and tear down the SCMI instance while the child still holds a handle into it. If the protocol driver probe later fails, for example with -EPROBE_DEFER, the driver core emits BUS_NOTIFY_DRIVER_NOT_BOUND rather than BUS_NOTIFY_UNBOUND_DRIVER. The SCMI notifier only released the handle on BUS_NOTIFY_UNBOUND_DRIVER, so each failed protocol-device bind leaked the SCMI instance users refcount and left sdev->handle set after the failed probe. Make the link helper report failure and drop the acquired handle if the link cannot be created. Also handle BUS_NOTIFY_DRIVER_NOT_BOUND in the same cleanup path used for unbind so failed probes balance the earlier BUS_NOTIFY_BIND_DRIVER acquisition.

    Засегнати продукти

    • Linux Linux: b50c9270304cfed6ee1c4ce5036102ad7b762051 преди b5377e690cd4fe87ee52fcf067c9929414ea8f4e; 971fc0665f1361f23251e4d85fac4aed1b683505 преди 0f860db24ee95e5da4866303a35e55098b9641b3; 971fc0665f1361f23251e4d85fac4aed1b683505 преди df273eced7cec550465fd1bb82a5d2c3c7d3c437; 971fc0665f1361f23251e4d85fac4aed1b683505 преди a54dc23e8bd2246c28eafffa60b4634f0d1a11cc; 971fc0665f1361f23251e4d85fac4aed1b683505 преди 77d2985d1e80e67f32026fc03e975c4c83cc543d; 971fc0665f1361f23251e4d85fac4aed1b683505 преди e3a5c30d233ca5d3e799a80da806554c703bda13
    • Linux Linux: 6.3; преди 6.3; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-93084: Linux | freedomonline.bg