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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-74277

iommu/dma-iommu: Fix wrong scatterlist length assignment in P2PDMA path

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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`.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a25e7962db0d79882c9d32fd2a67a02e79129c0e to < 6166cb1344f16dd403f2192f4bea6f6654f1ae1eaffected
  • a25e7962db0d79882c9d32fd2a67a02e79129c0e to < 8646f00ce021e49f4f05bc1d4060a0c27b25d0e1affected
  • a25e7962db0d79882c9d32fd2a67a02e79129c0e to < db50fb87015b955a5a0c155293b2dd40d63a3b9eaffected

Linux Linux

Default version status: affected

  • 6.16affected
  • 0 to < 6.16unaffected
  • 6.18.57 to ≤ 6.18.*unaffected
  • 7.1.5 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References