CVE-2026-53164

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/dma: Do not try to iommu_map a 0 length region in swiotlb iommu_dma_iova_link_swiotlb() processes a mapping that is unaligned in three parts, the head, middle and trailer. If the middle is empty because there are no aligned pages it will call down to iommu_map() with a 0 size which the iommupt implementation will fail as illegal. It then tries to do an error unwind and starts from the wrong spot corrupting the mapping so the eventual destruction triggers a WARN_ON. Check for 0 length and avoid mapping and use offset not 0 as the starting point to unlink. This is frequently triggered by using some kinds of thunderbolt NVMe drives that trigger forced SWIOTLB for unaligned memory. NVMe seems to pass in oddly aligned buffers for the passthrough commands from smartctl that hit this condition.

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Produits concernés

• Linux
• Linux linux kernel

Scores CVSS

Références

• https://git.kernel.org/stable/c/6ec91df8aff77e2e8fe3179c1f3fc15b43a40ba3 Patch
• https://git.kernel.org/stable/c/ab61c990a87d084f5565ee70340543e3a5394697 Patch
• https://git.kernel.org/stable/c/b16f8d40bac9ced838d24c9842707af9ecae92e2 Patch

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories