Vulnerability-Lookup

UBUNTU-CVE-2026-12681 (CVE-2026-12681)

Vulnerability from osv_ubuntu – Published: 2026-06-24 02:16 – Updated: 2026-06-25 17:12 – Source website

Details

Improper Validation of Specified Index, Position, or Offset in Input vulnerability in Google go-attestation. parseEfiSignatureList() does not advance the buffer past vendor bytes before reading entries. For hashSHA256SigGUID lists, this allows attacker-controlled vendor header bytes to be appended to the trusted SHA256 hash list. A crafted TPM event log could inject arbitrary SHA256 hashes into the verifier's trusted measurement database, enabling a remote attestation verifier to accept a compromised boot state. This issue affects go-attestation: through 0.6.0.

Severity

8.9 (High)


                    
                      CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-12681	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-12681	REPORT
	https://github.com/google/go-attestation/commit/b…	REPORT
	https://github.com/google/go-attestation/releases…	REPORT
	https://github.com/google/go-attestation/security…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "attest-tool",
            "binary_version": "0.6.0-1"
          },
          {
            "binary_name": "golang-github-google-go-attestation-dev",
            "binary_version": "0.6.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "golang-github-google-go-attestation",
        "purl": "pkg:deb/ubuntu/golang-github-google-go-attestation@0.6.0-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.5.1-2",
        "0.6.0-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Improper Validation of Specified Index, Position, or Offset in Input vulnerability in Google go-attestation. parseEfiSignatureList() does not advance the buffer past vendor bytes before reading entries. For hashSHA256SigGUID lists, this allows attacker-controlled vendor header bytes to be appended to the trusted SHA256 hash list. A crafted TPM event log could inject arbitrary SHA256 hashes into the verifier\u0027s trusted measurement database, enabling a remote attestation verifier to accept a compromised boot state. This issue affects go-attestation: through 0.6.0.",
  "id": "UBUNTU-CVE-2026-12681",
  "modified": "2026-06-25T17:12:18Z",
  "published": "2026-06-24T02:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-12681"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-12681"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/google/go-attestation/commit/b6e905e7ae52937f02b5ca494dd1c6a3ac7a1003"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/google/go-attestation/releases/tag/v0.6.1"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/google/go-attestation/security/advisories/GHSA-9r4w-jg96-92mv"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-12681"
  ]
}

CVE-2026-12681 (GCVE-0-2026-12681)

Vulnerability from cvelistv5 – Published: 2026-06-24 00:49 – Updated: 2026-06-24 12:57

Summary

Severity

8.9 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-24 12:57 UTC

CWE

CWE-1285 - Improper validation of specified index, position, or offset in input

Assigner

Google Google root

References

3 references

URL	Tags
https://github.com/google/go-attestation/security…
https://github.com/google/go-attestation/commit/b…
https://github.com/google/go-attestation/releases…

Impacted products

1 product

Vendor	Product	Version
Google	go-attestation	Affected: 0 , ≤ 0.6.0 (semver)

Credits

https://github.com/prasanna8585

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
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                "id": "CVE-2026-12681",
                "options": [
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-24T12:57:27.832740Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
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          "url": "https://github.com/google/go-attestation/releases/tag/v0.6.1"
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      "source": {
        "discovery": "UNKNOWN"
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    "dateReserved": "2026-06-19T05:49:21.869Z",
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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UBUNTU-CVE-2026-12681 (CVE-2026-12681)

CVE-2026-12681 (GCVE-0-2026-12681)

Tags

Sightings

Nomenclature

Related by attack behaviour