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CVE Record

CVE-2022-50824: tpm: tpm_tis: Add the missed acpi_put_table() to fix memory leak

In the Linux kernel, the following vulnerability has been resolved: tpm: tpm_tis: Add the missed acpi_put_table() to fix memory leak In check_acpi_tpm2(), we get the TPM2 table just to make sure the table is there, not used after the init, so the acpi_put_table() should be added to release the ACPI memory.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel TPM driver memory leak. The source describes a missing release call after checking the ACPI TPM2 table during initialization. It is not listed as actively exploited, and no CVSS score is provided. Business urgency is mainly patch hygiene for Linux systems using affected kernel lines.

Executive priority

Treat as routine Linux kernel maintenance, not an emergency, based on current evidence. Include it in scheduled patch cycles, with extra attention to systems relying on TPM-backed platform security or long-lived kernel baselines.

Technical view

In tpm_tis, check_acpi_tpm2() obtains the ACPI TPM2 table only to confirm it exists, but did not call acpi_put_table() afterward. Stable Linux commits add that release call. The provided affected data names Linux kernel versions and stable fixes, but does not provide exploitability details, CVSS, or CWE mapping.

Likely exposure

Exposure is limited to Linux systems running affected kernel builds with the TPM TIS path involved. The source bundle lists Linux kernel versions from 4.13 through 6.2-related stable lines, but exact distribution package impact must be confirmed against vendor kernel advisories.

Exploitation context

No active exploitation is supported by the provided sources. The CVE is not marked KEV, and the public description frames the issue as a memory leak from missed ACPI table release during initialization, not a remote compromise path.

Researcher notes

Evidence is sparse: no CVSS, CWE, exploit report, or detailed impact analysis is provided. The observable fix is a missing acpi_put_table() in check_acpi_tpm2(). Researchers should validate affectedness through exact kernel commit ancestry or vendor backport status.

Mitigation direction

  • Update affected Linux kernels through distribution or upstream stable channels.
  • Prioritize systems using TPM features or hardware-backed boot/security workflows.
  • Check vendor advisories for backported fixes in distribution kernel packages.
  • Avoid direct assumptions from upstream version numbers alone.
  • Track this as patch hygiene unless new exploit evidence appears.

Validation and detection

  • Inventory Linux kernel versions across servers, endpoints, and appliances.
  • Map distribution kernel packages to the listed upstream stable fixes.
  • Confirm whether TPM TIS support is present or enabled on relevant systems.
  • Review vendor changelogs for the acpi_put_table() tpm_tis fix.
  • Verify patched kernels are running after reboot, not only installed.
Prepared
Confidence
medium
Sources
10

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2022-50824 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
9Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux4cb586a188d468e05649575f0689dd2bf8c122e6, 4cb586a188d468e05649575f0689dd2bf8c122e6, 4cb586a188d468e05649575f0689dd2bf8c122e6, 4cb586a188d468e05649575f0689dd2bf8c122e6, 4cb586a188d468e05649575f0689dd2bf8c122e6, 4cb586a188d468e05649575f0689dd2bf8c122e6, 4cb586a188d468e05649575f0689dd2bf8c122e6, 4cb586a188d468e05649575f0689dd2bf8c122e6unaffected
LinuxLinux4.13, 0, 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.87, 6.0.17, 6.1.3, 6.2affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.