CVE-2026-6727 (GCVE-0-2026-6727)

Vulnerability from cvelistv5 – Published: 2026-08-11 15:22 – Updated: 2026-08-11 15:25
VLAI
Title
CVE-2026-6727
Summary
A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker with access to the TPM command interface may be able to exploit timing differences to recover information that could allow decryption of ciphertexts encrypted to TPM-managed RSA keys, including the RSA Endorsement Key (EK), including import blobs, credential blobs, and session salts. Under certain conditions, this may also enable the forgery of TPM 2.0 attestations. Refer to TCGVRT0011.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
Trusted Computing Group TPM2.0 Affected: 0 , ≤ v184 (custom)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "TPM2.0",
          "vendor": "Trusted Computing Group",
          "versions": [
            {
              "lessThanOrEqual": "v184",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker with access to the TPM command interface may be able to exploit timing differences to recover information that could allow decryption of ciphertexts encrypted to TPM-managed RSA keys, including the RSA Endorsement Key (EK), including import blobs, credential blobs, and session salts. Under certain conditions, this may also enable the forgery of TPM 2.0 attestations. Refer to TCGVRT0011."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-208 Observable Timing Discrepancy",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-11T15:25:58.448Z",
        "orgId": "37e5125f-f79b-445b-8fad-9564f167944b",
        "shortName": "certcc"
      },
      "references": [
        {
          "url": "https://trustedcomputinggroup.org/about/security/"
        },
        {
          "url": "https://trustedcomputinggroup.org/wp-content/uploads/VRT0011-Advisory_Final-1.pdf"
        },
        {
          "url": "https://trustedcomputinggroup.org/wp-content/uploads/Extended-vrt0010-11-guidance_V1.pdf"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "CVE-2026-6727",
      "x_generator": {
        "engine": "VINCE 3.0.43",
        "env": "prod",
        "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-6727"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b",
    "assignerShortName": "certcc",
    "cveId": "CVE-2026-6727",
    "datePublished": "2026-08-11T15:22:18.547Z",
    "dateReserved": "2026-04-20T21:18:19.891Z",
    "dateUpdated": "2026-08-11T15:25:58.448Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-6727\",\"sourceIdentifier\":\"cret@cert.org\",\"published\":\"2026-08-11T16:17:34.503\",\"lastModified\":\"2026-08-11T16:17:34.503\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A timing side-channel vulnerability exists in the RSA OAEP decryption implementation. A privileged local attacker with access to the TPM command interface may be able to exploit timing differences to recover information that could allow decryption of ciphertexts encrypted to TPM-managed RSA keys, including the RSA Endorsement Key (EK), including import blobs, credential blobs, and session salts. Under certain conditions, this may also enable the forgery of TPM 2.0 attestations. Refer to TCGVRT0011.\"}],\"affected\":[{\"source\":\"cret@cert.org\",\"affectedData\":[{\"vendor\":\"Trusted Computing Group\",\"product\":\"TPM2.0\",\"versions\":[{\"version\":\"0\",\"lessThanOrEqual\":\"v184\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://trustedcomputinggroup.org/about/security/\",\"source\":\"cret@cert.org\"},{\"url\":\"https://trustedcomputinggroup.org/wp-content/uploads/Extended-vrt0010-11-guidance_V1.pdf\",\"source\":\"cret@cert.org\"},{\"url\":\"https://trustedcomputinggroup.org/wp-content/uploads/VRT0011-Advisory_Final-1.pdf\",\"source\":\"cret@cert.org\"}]}}"
  }
}



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