CVE-2026-74277 in Linux
الملخص
بحسب MITRE • 15/08/2026
In the Linux kernel, the following vulnerability has been resolved:
iommu/dma-iommu: Fix wrong scatterlist length assignment in P2PDMA path
In iommu_dma_map_sg(), when handling PCI P2PDMA cases, the DMA length of the current scatterlist segment `s` is incorrectly assigned from the head entry `sg->length` instead of the current entry `s->length`.
This typo causes all P2PDMA segments in the scatterlist to inherit the length of the first segment, leading to corrupted DMA lengths for multi- segment scatterlists.
Fix this by using `s->length` instead of `sg->length`.
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