Bug 2402302 (CVE-2023-53682)

Summary: CVE-2023-53682 kernel: hwmon: (xgene) Fix ioremap and memremap leak
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A resource management flaw was found in the Linux kernel xgene hardware monitor driver in the way I/O memory mappings were handled. Missing release of ioremap/memremap regions in probe paths could leak mapped resources. A local user could use this flaw to degrade system stability over time, resulting in a denial of service.
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Description OSIDB Bzimport 2025-10-07 16:08:15 UTC 
In the Linux kernel, the following vulnerability has been resolved:

hwmon: (xgene) Fix ioremap and memremap leak

Smatch reports:

drivers/hwmon/xgene-hwmon.c:757 xgene_hwmon_probe() warn:
'ctx->pcc_comm_addr' from ioremap() not released on line: 757.

This is because in drivers/hwmon/xgene-hwmon.c:701 xgene_hwmon_probe(),
ioremap and memremap is not released, which may cause a leak.

To fix this, ioremap and memremap is modified to devm_ioremap and
devm_memremap.

[groeck: Fixed formatting and subject]
Comment 1 Jon Moroney 2025-10-07 19:05:20 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100709-CVE-2023-53682-10e4@gregkh/T