CVE-2026-80884

A flaw was found in the Linux kernel's NTB (Non-Transparent Bridge) module. This vulnerability arises from the incorrect handling of Direct Memory Access (DMA) addresses during memory deallocation. The DMA API requires that the dma_free_attrs function receives the exact dma_handle originally provided by the allocation function. Modifying this handle before deallocation can lead to memory corruption, potentially causing system instability or a denial of service.

This vulnerability is rated as Low impact for Red Hat Enterprise Linux because Non-Transparent Bridge (NTB) hardware is specialized interconnect equipment not present or configured in typical enterprise installations. A local attacker requires access to a system with an active NTB transport configuration, significantly restricting exposure. Consequently, the potential for local denial of service or instability is confined to environments utilizing dedicated PCIe bridge configurations.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.