CVE-2026-80884
Received Received - Intake

ntb DMA Address Handling Use-After-Free Vulnerability

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ntb: Store original DMA address for future release The DMA API requires that dma_free_attrs receive the exact dma_handle originally returned by the allocation function. Do not modify it.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-05
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-80884
EUVD
EUVD-2026-71514

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability involves incorrect handling of DMA addresses in the Linux kernel's NTB (Non-Transparent Bridge) subsystem. The issue occurs when the original DMA address returned by the allocation function is modified before being passed to dma_free_attrs, which violates the DMA API requirement to use the exact original address for freeing memory.

Impact Analysis

This vulnerability could lead to memory corruption or system crashes if the DMA address is incorrectly modified and later freed. It may cause instability in systems using NTB for inter-processor communication or peripheral device connections.

Mitigation Strategies

Update the Linux kernel to the latest patched version to resolve the DMA address handling issue in the NTB subsystem.

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