CVE-2022-50824
kernel: tpm: tpm_tis: Add the missed acpi_put_table() to fix memory leak
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 30, 2025
Updated · July 22, 2026
Description
A memory leak flaw was found in the Linux kernel's TPM TIS driver. The check_acpi_tpm2() function retrieves the TPM2 ACPI table to verify its presence but fails to release the table reference via acpi_put_table(), resulting in a memory leak each time the function is called during driver initialization.
Statement
This is a one-time memory leak that occurs during TPM driver initialization. The leaked memory is small and does not grow over time during normal system operation. Systems without TPM hardware or not using TPM are unaffected.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE-911 · Improper Update of Reference Count