Към съдържанието
Търсене

CVE-2026-98342: Linux

Няма оценка

CVSS

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: dmaengine: wait for RCU readers before releasing dma_device dma_issue_pending_all() walks the dma_device_list with list_for_each_entry_rcu() under rcu_read_lock(). dma_device_release() unlinks the device with list_del_rcu() and then calls device->device_release() (which in many drivers, such as plx_dma.c, directly calls kfree()). Because there is no grace period between unlinking the device and freeing it, concurrent RCU readers in dma_issue_pending_all() can access the device after it has been freed. The lockless walk originally relied on clients holding a dmaengine reference to pin the provider module, and therefore the device, for as long as they might traverse the list. Commit 8ad342a86359 ("dmaengine: Add reference counting to dma_device struct") decoupled the dma_device lifetime from the module reference, so the device can now be released while a reader is still walking the list. Add synchronize_rcu() before the device is freed, so RCU readers are guaranteed to have finished. Keep it unconditional: providers that do not implement device_release() free the device themselves once dma_async_device_unregister() returns. This call will delay for a grace period with dma_list_mutex held, which is safe and only teardown path is delayed.

    Засегнати продукти

    • Linux Linux: 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 преди ac8ce9f89638d6d79875cca7d8ae42566a9bde15; 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 преди 14578c78405d51fa92e4ada4502a45f537c0fcb8; 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 преди cbb3310a5167e868a5e763e32b9a23b4d50669ee; 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 преди 8577a5ec4f7e00443015ef99f646def093121a1b; 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 преди 4448a539a0c39141cccc67be6cacde0f35024313; 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 преди fc1f4884f1d46fc7a8cee6e2997ecc9e8d1c7f77; 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 преди 4aed7e47a10b94ea3c5171e8d1382081accd2e03; 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 преди dc750422170a563c7a81f6e49d36bb02c62ae37f
    • Linux Linux: 2.6.29; преди 2.6.29; 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

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98342: Linux | freedomonline.bg