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CVE-2026-90241: Linux

8.2

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 локално, без особени условия, с администраторски права и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Tear down scalable-mode context on probe failure intel_pasid_setup_sm_context() walks a PCI device’s DMA aliases via pci_for_each_dma_alias() and programs a scalable-mode context entry for each RID. For a device with a dma_alias_mask, the callback is invoked once for the device’s own RID and once for each alias bit, all with the same pci_dev, so device_pasid_table_setup() runs for multiple RIDs. pci_for_each_dma_alias() stops at the first callback error. Therefore, a failure partway through the walk can leave context entries for already processed RIDs present and still pointing to the device’s PASID table. On this error path, intel_iommu_probe_device() currently jumps directly to intel_pasid_free_table(), which frees the PASID table without first tearing down those context entries. The IOMMU may then walk a present context entry whose PASID table pointer references freed memory. intel_iommu_release_device() already performs teardown before freeing the table. Apply the same ordering on the probe failure path. device_pasid_table_teardown() safely handles RIDs that were never programmed: iommu_context_addr() returns NULL when no context table has been allocated, and clearing the Present bit of an already non-present entry is a no-op. So unwind is safe for both the alias that failed and any aliases not yet reached.

    Засегнати продукти

    • Linux Linux: 301f1a80487fd2f51012533792583d4425e8b8c0 преди 25ac85a9747cd63e1d166ace7b360a2cd9479d9d; 301f1a80487fd2f51012533792583d4425e8b8c0 преди d0e978ced7429b516358bb4d41d337214768ae98; 301f1a80487fd2f51012533792583d4425e8b8c0 преди db5daf25f754cdc20c18525adb88240ece6fdee9; 301f1a80487fd2f51012533792583d4425e8b8c0 преди c509fb73a1093a15accd7d43a61645d4b520f6ac
    • Linux Linux: 6.9; преди 6.9; 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-2026-90241: Linux | freedomonline.bg