Bug 2426198 (CVE-2023-54309)

Summary: CVE-2023-54309 kernel: tpm: tpm_vtpm_proxy: fix a race condition in /dev/vtpmx creation
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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Description OSIDB Bzimport 2025-12-30 13:15:51 UTC 
In the Linux kernel, the following vulnerability has been resolved:

tpm: tpm_vtpm_proxy: fix a race condition in /dev/vtpmx creation

/dev/vtpmx is made visible before 'workqueue' is initialized, which can
lead to a memory corruption in the worst case scenario.

Address this by initializing 'workqueue' as the very first step of the
driver initialization.
Comment 1 Alexander B 2025-12-31 02:00:33 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123035-CVE-2023-54309-4435@gregkh/T