CVE-2026-43462

Analyzed Analyzed - Analysis Complete

Memory Leak in Spacemit Linux Kernel Network Driver

Publication date: 2026-05-08

Last updated on: 2026-05-20

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: net: spacemit: Fix error handling in emac_tx_mem_map() The DMA mappings were leaked on mapping error. Free them with the existing emac_free_tx_buf() function.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-05-08

Last Modified

2026-05-20

Generated

2026-07-09

AI Q&A

2026-05-08

EPSS Evaluated

2026-07-08

NVD

CVE-2026-43462

EUVD

EUVD-2026-28768

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	From 6.19 (inc) to 6.19.9 (exc)
linux	linux_kernel	From 6.18 (inc) to 6.18.19 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel's network subsystem, specifically in the spacemit component. It involves improper error handling in the function emac_tx_mem_map(). When an error occurs during DMA (Direct Memory Access) mapping, the allocated DMA mappings were not properly released, causing a resource leak. The fix involves freeing these DMA mappings using the existing emac_free_tx_buf() function to prevent the leak.

Impact Analysis

The impact of this vulnerability is primarily related to resource leakage in the Linux kernel's network subsystem. If DMA mappings are leaked due to improper error handling, it can lead to increased memory usage and potentially degrade system performance or stability over time. In severe cases, this could cause system crashes or denial of service if resources are exhausted.

Mitigation Strategies

The vulnerability in the Linux kernel related to DMA mappings being leaked on mapping error has been fixed by correcting error handling in the emac_tx_mem_map() function.

To mitigate this vulnerability, you should update your Linux kernel to a version that includes this fix.

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