CVE-2026-108268 Privasys CVE debrief

Who should care

Defenders of Enclave OS Virtual deployments should assess exposure and prioritize updating affected versions to prevent potential relay attacks. This includes operators, platform administrators, vulnerability management teams, and security teams responsible for Enclave OS Virtual environments.

Why it matters

CVE-2026-108268 allows potential relay attacks against Enclave OS Virtual deployments prior to tdx-v0.2.43 and tdx-gpu-v0.6.27, impacting confidentiality and integrity of attested connections.

• Potential relay attacks against Enclave OS Virtual deployments
• Need to verify and update affected deployments to prevent exploitation
• Possible impact on confidentiality and integrity of attested connections

Technical summary

Enclave OS Virtual runs container workloads inside confidential virtual machines with end-to-end attestation. Prior to tdx-v0.2.43 and tdx-gpu-v0.6.27, the TDX/GPU RA-TLS certificate issuer placed the certificate public-key hash and client nonce in quote ReportData but omitted a value bound to the active TLS session. An attacker who obtained an enclave TLS private key could relay a genuine quote onto another connection, causing a relying party to accept an attacker-terminated connection as the attested enclave.

Defensive priority

Defenders should prioritize verifying and updating affected Enclave OS Virtual deployments to prevent potential relay attacks.

Recommended defensive actions

• Verify and update affected Enclave OS Virtual deployments to tdx-v0.2.43 or tdx-gpu-v0.6.27
• Review and assess exposure of Enclave OS Virtual deployments
• Monitor for potential relay attacks
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item provide details on the vulnerability, affected versions, and fixed versions. However, limited information is available on potential exploitation or victim impact. Defenders should verify and update affected Enclave OS Virtual deployments to tdx-v0.2.43 or tdx-gpu-v0.6.27. The source item and CVE record confirm the vulnerability but do not provide extensive details on exploitation or impact.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.