---
title: "CVE-2026-119116: AWS aws-nitro-enclaves-sdk-c - Use After Free"
description: "AWS aws-nitro-enclaves-sdk-c < 0.4.6 contains a use-after-free and double-free vulnerability in the SetClient command handler of kmstool-enclave, letting applications on the parent EC2 instance corrupt heap memory and execute arbitrary code within the enclave, exploit requires running application on parent EC2 instance."
url: https://panop.io/threat-heartbeat/CVE-2026-119116/
---

# CVE-2026-119116 AWS aws-nitro-enclaves-sdk-c - Use After Free

AWS aws-nitro-enclaves-sdk-c < 0.4.6 contains a use-after-free and double-free vulnerability in the SetClient command handler of kmstool-enclave, letting applications on the parent EC2 instance corrupt heap memory and execute arbitrary code within the enclave, exploit requires running application on parent EC2 instance.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-119116)

## Details

Type

Use After Free

Impact

Remote Code Execution

CVSS vector

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

Published

30 October 2026

Updated

1 November 2026

Weakness

[CWE-415](https://cwe.mitre.org/data/definitions/415.html)

## Vendor fix

Rebuild enclave images with aws-nitro-enclaves-sdk-c 0.4.6 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-119116](https://nvd.nist.gov/vuln/detail/CVE-2026-119116)
- [https://aws.amazon.com/security/security-bulletins/2026-157-aws/](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/releases/tag/v0.4.6)
- [https://github.com/aws/aws-nitro-enclaves-sdk-c/security/advisories/GHSA-cfhm-qfw4-j7qq](https://github.com/aws/aws-nitro-enclaves-sdk-c/security/advisories/GHSA-cfhm-qfw4-j7qq)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)