CVE-2026-43155
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Linux Kernel mmio regmap Leak on Probe Failure

Publication date: 2026-05-06

Last updated on: 2026-05-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: mux: mmio: fix regmap leak on probe failure The mmio regmap that may be allocated during probe is never freed. Switch to using the device managed allocator so that the regmap is released on probe failures (e.g. probe deferral) and on driver unbind.
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Meta Information
Published
2026-05-06
Last Modified
2026-05-06
Generated
2026-06-16
AI Q&A
2026-05-06
EPSS Evaluated
2026-06-15
NVD
CVE-2026-43155
EUVD
EUVD-2026-27716
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 exists in the Linux kernel related to the mux mmio regmap allocation during the probe process.

Specifically, the mmio regmap that may be allocated during probe is never freed if the probe fails.

The fix involves switching to a device managed allocator so that the regmap is properly released on probe failures (such as probe deferral) and when the driver is unbound.

Impact Analysis

If the mmio regmap allocated during probe is not freed on failure, it can lead to resource leaks in the Linux kernel.

Such leaks could cause increased memory usage or resource exhaustion over time, potentially affecting system stability or performance.

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