What’s Vulnerable › Vulnerabilities

CVE-2022-50562: tpm: acpi: Call acpi_put_table() to fix memory leak

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-22 · updated 2026-06-17

Description

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().

Affected products

• Linux kernel: 4.18 — fixed in 6.2

How to fix

Upgrade to a fixed version: Linux kernel 6.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/638cd298dfebce46919cbd6cf1884701215f506d
• https://git.kernel.org/stable/c/694a3d66f493afd77c704c6de91d9be4d6e004e4
• https://git.kernel.org/stable/c/8740a12ca2e2959531ad253bac99ada338b33d80
• https://git.kernel.org/stable/c/8ddc48068ac85740d3d5f9f3b0b323e733a35b33
• https://git.kernel.org/stable/c/bf31e3f8077af539feaf4e9bbf82e8eb51e7e5a8

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