Bug 2405754 (CVE-2022-50562)

Summary: CVE-2022-50562 kernel: tpm: acpi: Call acpi_put_table() to fix memory leak
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-10-22 14:04:40 UTC 
In the Linux kernel, the following vulnerability has been resolved:

tpm: acpi: Call acpi_put_table() to fix memory leak

The start and length of the event log area are obtained from
TPM2 or TCPA table, so we call acpi_get_table() to get the
ACPI information, but the acpi_get_table() should be coupled with
acpi_put_table() to release the ACPI memory, add the acpi_put_table()
properly to fix the memory leak.

While we are at it, remove the redundant empty line at the
end of the tpm_read_log_acpi().
Comment 1 Jon Moroney 2025-10-22 17:00:21 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025102206-CVE-2022-50562-5b54@gregkh/T