CVE-2026-12681 – Google go-attestation: Integer Overflow in parseEfiSignatureList

CVE ID :CVE-2026-12681

Published : June 24, 2026, 12:49 a.m. | 2 hours, 55 minutes ago

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.

Severity: 8.9 | HIGH

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