Memory Leak in Linux Kernel cx88 Media Driver

Publication date: 2026-05-06

Last updated on: 2026-05-11

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: media: cx88: Add missing unmap in snd_cx88_hw_params() In error path, add cx88_alsa_dma_unmap() to release resource acquired by cx88_alsa_dma_map().

CVSS Scores

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Meta Information

Published

2026-05-06

Last Modified

2026-05-11

Generated

2026-07-06

AI Q&A

2026-05-06

EPSS Evaluated

2026-07-05

NVD

CVE-2026-43257

EUVD

EUVD-2026-27818

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 6.2 (inc) to 6.6.128 (exc)
linux	linux_kernel	From 6.7 (inc) to 6.12.75 (exc)
linux	linux_kernel	From 6.13 (inc) to 6.18.16 (exc)
linux	linux_kernel	From 6.19 (inc) to 6.19.6 (exc)
linux	linux_kernel	From 5.11 (inc) to 5.15.202 (exc)
linux	linux_kernel	From 5.16 (inc) to 6.1.165 (exc)
linux	linux_kernel	From 3.19 (inc) to 5.10.252 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-772	The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.

Attack-Flow Graph

Executive Summary

This vulnerability is in the Linux kernel's media subsystem, specifically in the cx88 driver. It involves a missing unmap operation in the function snd_cx88_hw_params(). In an error path, the function cx88_alsa_dma_unmap() was not called to release resources that were previously acquired by cx88_alsa_dma_map(). This means that when an error occurs, the allocated resources are not properly freed.

Impact Analysis

Because the vulnerability causes resources to not be released properly in error conditions, it can lead to resource leaks. Over time, this could degrade system performance or stability, potentially causing crashes or denial of service due to exhausted resources.

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