CVE-2026-45871
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TPM Locality Leak in STMicroelectronics st33zp24 Driver

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: tpm: st33zp24: Fix missing cleanup on get_burstcount() error get_burstcount() can return -EBUSY on timeout. When this happens, st33zp24_send() returns directly without releasing the locality acquired earlier. Use goto out_err to ensure proper cleanup when get_burstcount() fails.
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-45871
EUVD
EUVD-2026-32337
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's TPM driver for the st33zp24 chip. Specifically, the function get_burstcount() can return a -EBUSY error on timeout. When this error occurs, the st33zp24_send() function returns immediately without releasing the locality resource it previously acquired. This missing cleanup can lead to resource management issues.

Impact Analysis

The impact of this vulnerability is related to improper resource cleanup in the TPM driver. If the locality resource is not released properly due to the error, it could cause the TPM device or driver to become unresponsive or behave incorrectly, potentially affecting system stability or TPM operations.

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