UBUNTU-CVE-2026-12681

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Source
https://ubuntu.com/security/CVE-2026-12681
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12681.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-12681
Upstream
Published
2026-06-24T02:16:00Z
Modified
2026-06-25T17:12:18Z
Severity
  • 8.9 (High) CVSS_V4 - 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 CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:26.04:LTS / golang-github-google-go-attestation

Package

Name
golang-github-google-go-attestation
Purl
pkg:deb/ubuntu/golang-github-google-go-attestation?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.5.1-2
0.6.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "0.6.0-1",
            "binary_name": "attest-tool"
        },
        {
            "binary_version": "0.6.0-1",
            "binary_name": "golang-github-google-go-attestation-dev"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-12681.json"