CVE-2022-50824

Kernel memory leak via unreleased ACPI table

Published Dec 30, 2025 · Updated Dec 30, 2025

Memory leak in the Linux kernel TPM TIS ACPI initialization path from 4.13 leaves ACPI table memory unreleased during device setup. check_acpi_tpm2() obtains the TPM2 ACPI table solely to confirm its presence but omits acpi_put_table(), retaining the table reference after initialization. The published record identifies no repeatable attacker-controlled trigger, so the bounded consequence is a one-time kernel-memory leak when the affected TPM ACPI path runs.

CVSS severityUnavailable
Unscored
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the Linux kernel TPM TIS ACPI initialization path from 4.13 leaves ACPI table memory unreleased during device setup. check_acpi_tpm2() obtains the TPM2 ACPI table solely to confirm its presence but omits acpi_put_table(), retaining the table reference after initialization. The published record identifies no repeatable attacker-controlled trigger, so the bounded consequence is a one-time kernel-memory leak when the affected TPM ACPI path runs.

The record

CVE
CVE-2022-50824
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.13
  2. Affected versionversion=4cb586a188d468e05649575f0689dd2bf8c122e6 <3b6c822238da9ee8984803355601bcc603d49cb5
  3. Affected versionversion=4cb586a188d468e05649575f0689dd2bf8c122e6 <43135fb098126ef2cd6ed584900fd7bfa25f95ce
  4. Affected versionversion=4cb586a188d468e05649575f0689dd2bf8c122e6 <8bc6c10d3f389693410adb14b4e9deec01ff6334
  5. Affected versionversion=4cb586a188d468e05649575f0689dd2bf8c122e6 <db9622f762104459ff87ecdf885cc42c18053fd9
  6. Affected versionversion=4cb586a188d468e05649575f0689dd2bf8c122e6 <de667a2704ae799f697fd45cf4317623d8c79fb7
  7. Affected versionversion=4cb586a188d468e05649575f0689dd2bf8c122e6 <e027f3b9fabd2b410a4e6a7651e7a45b87019f23
  8. Affected versionversion=4cb586a188d468e05649575f0689dd2bf8c122e6 <e0d1cf8ef84bb14a673215699fb8acc187aa2c4a
  9. Affected versionversion=4cb586a188d468e05649575f0689dd2bf8c122e6 <e60fa800a32a693d672b1a091424d780278c4587

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.13; version=4cb586a188d468e05649575f0689dd2bf8c122e6 <3b6c822238da9ee8984803355601bcc603d49cb5; version=4cb586a188d468e05649575f0689dd2bf8c122e6 <43135fb098126ef2cd6ed584900fd7bfa25f95ce; version=4cb586a188d468e05649575f0689dd2bf8c122e6 <8bc6c10d3f389693410adb14b4e9deec01ff6334; version=4cb586a188d468e05649575f0689dd2bf8c122e6 <db9622f762104459ff87ecdf885cc42c18053fd9; version=4cb586a188d468e05649575f0689dd2bf8c122e6 <de667a2704ae799f697fd45cf4317623d8c79fb7; version=4cb586a188d468e05649575f0689dd2bf8c122e6 <e027f3b9fabd2b410a4e6a7651e7a45b87019f23; version=4cb586a188d468e05649575f0689dd2bf8c122e6 <e0d1cf8ef84bb14a673215699fb8acc187aa2c4a; version=4cb586a188d468e05649575f0689dd2bf8c122e6 <e60fa800a32a693d672b1a091424d780278c4587

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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