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Vulnerabilities

Vulnerability · CVE-2025-7844

Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default is used.

Published Aug 4, 2025 · catalog updated Aug 5, 2025 · wolfSSL Inc. wolfTPM

Last checked Oct 28, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-7844. EPSS is 0.16%. Act only if a listed version of wolfSSL Inc. wolfTPM is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low1.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.16%
Remediation
Vendor / distro source
Affected products
vendor wolfSSL Inc. wolfTPM 0 ≤3.9.2

Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2048 bits and your application calls on that key, then a stack buffer could be overrun. If the build-time macro is set correctly (RSA bits match what TPM hardware is capable of) for the hardware target, then a stack overrun is not possible.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor wolfSSL Inc. wolfTPM 0 ≤3.9.20 ≤3.9.2

How to fix CVE-2025-7844

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-7844. EPSS is 0.16%. Act only if a listed version of wolfSSL Inc. wolfTPM is installed.

Which versions are affected?

Compare what you have installed with wolfSSL Inc. wolfTPM 0 ≤3.9.2 0 ≤3.9.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.16%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 4, 2025 · EUVD

    Detected

    Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2048 bits and your application calls on that key, then a stack buffer could be overrun. If the build-time macro is set co

  2. Aug 5, 2025 · EUVD

    Updated

    Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2048 bits and your application calls on that key, then a stack buffer could be overrun. If the build-time macro is set co

Sources

  • CVE.orgVulnerability recordCVE-2025-7844

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-7844

    30-day exploitation probability 0.16%

    first.org
  • EUVDVulnerability recordEUVD-2025-23559

    Exporting a TPM based RSA key larger than 2048 bits from the TPM could overrun a stack buffer if the default is used. If your TPM 2.0 module supports RSA key sizes larger than 2048 bit and your applications supports creating or importing an RSA private or public key larger than 2

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 28, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 28, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 20, 2026