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CVE-2026-108268— enclave-os-virtual: RA-TLS challenge certificates were not bound to the TLS session

Quick assessment

Affected
Privasys enclave-os-virtual
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Enclave OS Virtual 通过在机密虚拟机中运行容器工作负载，并实现端到端远程证明（attestation）来保障安全性。在 tdx-v0.2.43 和 tdx-gpu-v0.6.27 版本之前，TDX/GPU 远程证明 TLS（RA-TLS）证书颁发机构将证书公钥哈希值和客户端随机数（nonce）放置在 Quote 的 ReportData 字段中，但遗漏了与当前活跃 TLS 会话绑定的绑定值。攻击者若获取了机密容器（enclave）的 TLS 私钥，便可将有效的 Quote 中继到另一个连接上，导致

CVSS 9.1 · Critical EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 2

VendorProduct Version RangeStatus
Privasys enclave-os-virtual < tdx-v0.2.43 affected
< tdx-gpu-v0.6.27 affected
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I. Basic Information for CVE-2026-108268

Vulnerability Information
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Vulnerability Title
enclave-os-virtual: RA-TLS challenge certificates were not bound to the TLS session
Source: CVE Program / CVE List V5
Vulnerability Description
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. This issue is fixed in tdx-v0.2.43 and tdx-gpu-v0.6.27.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Privasys enclave-os-virtual < tdx-v0.2.43 -

II. Public POCs for CVE-2026-108268

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III. Intelligence Information for CVE-2026-108268

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Vendor Advisories for CVE-2026-108268 (1)

Security Blog Posts for CVE-2026-108268 (1)

Vendor Pages for CVE-2026-108268 (1)

Same Patch Batch · Privasys · 2026-10-09 · 5 CVEs total

CVE-2026-108265 9.1 CRITICAL enclave-os-mini: RA-TLS challenge certificates were not bound to the TLS session
CVE-2026-108266 9.1 CRITICAL Privasys rustls fork: RA-TLS challenge mode did not bind attestation evidence to the TLS s
CVE-2026-108269 9.1 CRITICAL ra-tls-clients: RA-TLS challenge verifier accepted quotes not bound to the TLS session
CVE-2026-108267 9.1 CRITICAL Privasys Go fork: RA-TLS challenge mode did not bind attestation evidence to the TLS sessi

IV. Related Vulnerabilities

Same vendor: Privasys
Same weakness: CWE-346

V. Comments for CVE-2026-108268

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