8.8

CVE-2026-74277

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

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`.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version a25e7962db0d79882c9d32fd2a67a02e79129c0e
Version < 8646f00ce021e49f4f05bc1d4060a0c27b25d0e1
Status affected
Version a25e7962db0d79882c9d32fd2a67a02e79129c0e
Version < db50fb87015b955a5a0c155293b2dd40d63a3b9e
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.16
Status affected
Version 0
Version < 6.16
Status unaffected
Version <= 7.1.*
Version 7.1.5
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.051
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.8 2 6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/8646f00ce021e49f4f05bc1d4060a0c27b25d0e1
https://git.kernel.org/stable/c/db50fb87015b955a5a0c155293b2dd40d63a3b9e