CVE-2026-12681
Google go-attestation: Integer Overflow in parseEfiSignatureList
Description
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.
INFO
Published Date :
June 24, 2026, 12:49 a.m.
Last Modified :
June 24, 2026, 12:49 a.m.
Remotely Exploit :
Yes !
Source :
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | 14ed7db2-1595-443d-9d34-6215bf890778 |
Solution
- Update go-attestation to a patched version.
- Validate buffer handling for index, position, and offset.
- Ensure proper advancement past vendor bytes before reading entries.
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