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CVE-2026-98344: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: dmaengine: Fix device kref underflow in dma_chan_put() dma_chan_get() takes chan->device->ref only on the slow path: /* no kref on fast path */ if (chan->client_count) { __module_get(owner); chan->client_count++; return 0; } if (!try_module_get(owner)) return -ENODEV; if (!dma_device_get(chan->device)) { // calls kref_get_unless_zero() dma_chan_put() drops the ref unconditionally, so every fast-path get/put pair drops one extra device reference. The bug fires when two conditions hold together: a non-private provider has a persistent client holding chan->client_count > 0 and another client cycles dmaengine_get()/dmaengine_put(). When the kref hits zero, the subsequent dma_find_channel() returns NULL even though the provider module is still loaded. Fix this by dropping device->ref only on the last put, matching the single slow-path get.

    Засегнати продукти

    • Linux Linux: 8ad342a863590b24ce77681b7e081363fb3333f7 преди 036b527f92570206da4b8c40b38f8d689e29d0f3; 8ad342a863590b24ce77681b7e081363fb3333f7 преди 5fb1797a8c9485e40e5492fa0338ab5c7d1f3fef; 8ad342a863590b24ce77681b7e081363fb3333f7 преди 57f7f1c6827be7d8f80feca48d2125fb91c6f6ed; 8ad342a863590b24ce77681b7e081363fb3333f7 преди 7c3f4ce651d43705f9ec7f778f642a90d5ff4fba; 8ad342a863590b24ce77681b7e081363fb3333f7 преди de2677e57d3161390d8a508f08cddec6ef7e4b23; 8ad342a863590b24ce77681b7e081363fb3333f7 преди 1a0d9b406febf23054ad595fd47b29325e70fb2d; 8ad342a863590b24ce77681b7e081363fb3333f7 преди 77906ac448d2fa81fa710ae26c0e591ebdc81154; 8ad342a863590b24ce77681b7e081363fb3333f7 преди 44dab659064eb5c10adb0306510eebe848ed592d
    • Linux Linux: 5.6; преди 5.6; 5.10.271 до 5.10.*; 5.15.222 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.112 до 6.12.*; 6.18.54 до 6.18.*; 7.2.8 до 7.2.*; от 7.3 нататък

    История

    • 6 октомври 2026 Публикувано

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    CVE-2026-98344: Linux | freedomonline.bg