CVE-2026-119116

CVSS 8.7 (high) · published 2026-10-30

A use-after-free and double-free issue in the SetClient command handler of the kmstool-enclave sample application of AWS aws-nitro-enclaves-sdk-c before 0.4.6 may allow an application that runs on the parent EC2 instance to corrupt heap memory inside a Nitro Enclave which may lead to arbitrary code execution within the enclave. To remediate this issue, users should rebuild any enclave image that includes kmstool-enclave, or code derived from it, against aws-nitro-enclaves-sdk-c 0.4.6.

Weakness: CWE-415, CWE-416

Source: NVD CVE-2026-119116

References

• https://aws.amazon.com/security/security-bulletins/2026-157-aws/
• https://github.com/aws/aws-nitro-enclaves-sdk-c/releases/tag/v0.4.6
• https://github.com/aws/aws-nitro-enclaves-sdk-c/security/advisories/GHSA-cfhm-qfw4-j7qq

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