ubuntu-cve-2026-6726
Vulnerability from osv_ubuntu
Published
2026-08-11 16:17
Modified
2026-08-19 11:01
Summary
Details

An information leakage vulnerability was reported in the TCG TPM 2.0 reference code that could allow a local attacker with elevated privileges to obtain a credential from a TPM-aware CA for a falsified TPM key (such as an Attestation Key, DevID Key or TLS authentication key) and falsify other TPM 2.0 attestations with this key. See also TCG VRT0010.

Severity
7.9 (High)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtpms0",
            "binary_version": "0.9.3-0ubuntu1.22.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libtpms",
        "purl": "pkg:deb/ubuntu/libtpms@0.9.3-0ubuntu1.22.04.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.8.2-1ubuntu1",
        "0.9.0-0ubuntu1",
        "0.9.0-0ubuntu2",
        "0.9.0-0ubuntu3",
        "0.9.0-0ubuntu4",
        "0.9.3-0ubuntu1",
        "0.9.3-0ubuntu1.22.04.1",
        "0.9.3-0ubuntu1.22.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtpms0",
            "binary_version": "0.9.3-0ubuntu4.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libtpms",
        "purl": "pkg:deb/ubuntu/libtpms@0.9.3-0ubuntu4.24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.3-0ubuntu2",
        "0.9.3-0ubuntu3",
        "0.9.3-0ubuntu4",
        "0.9.3-0ubuntu4.24.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "An information leakage vulnerability was reported in the TCG TPM 2.0 reference code that could allow a local attacker with elevated privileges to obtain a credential from a TPM-aware CA for a falsified TPM key (such as an Attestation Key, DevID Key or TLS authentication key) and falsify other TPM 2.0 attestations with this key.  See also TCG VRT0010.",
  "id": "UBUNTU-CVE-2026-6726",
  "modified": "2026-08-19T11:01:17Z",
  "published": "2026-08-11T16:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-6726"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-6726"
    },
    {
      "type": "REPORT",
      "url": "https://groups.google.com/g/libtpms-announce/c/xB2PqSQRA_8"
    },
    {
      "type": "REPORT",
      "url": "https://trustedcomputinggroup.org/resource/errata-for-tpm-library-specification-2-0/"
    },
    {
      "type": "REPORT",
      "url": "https://trustedcomputinggroup.org/wp-content/uploads/Extended-vrt0010-11-guidance_V1.pdf"
    },
    {
      "type": "REPORT",
      "url": "https://trustedcomputinggroup.org/wp-content/uploads/VRT0010-Advisory_Final-1.pdf"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-6726"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.