CVE-2026-43155
Linux Kernel mmio regmap Leak on Probe Failure
Publication date: 2026-05-06
Last updated on: 2026-05-06
Assigner: kernel.org
Description
Description
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.