CVE-2026-119116

8.7 high

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.

Severity

CVSS 4.0

8.7 high

CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L

CVSS 3.1

7.8 high

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CWEs: CWE-415, CWE-416
Published: 2026-10-30
Modified: 2026-10-30
Record from: the NVD, synced 2026-10-30

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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