CVE-2026-119116

high

Description

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.

References

https://github.com/aws/aws-nitro-enclaves-sdk-c/security/advisories/GHSA-cfhm-qfw4-j7qq

https://github.com/aws/aws-nitro-enclaves-sdk-c/releases/tag/v0.4.6

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-114183

https://aws.amazon.com/security/security-bulletins/2026-157-aws/

Details

Source: Mitre, NVD

Published: 2026-10-30

Updated: 2026-10-30

Risk Information

CVSS v2

Base Score: 6

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

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

Severity: High

CVSS v4

Base Score: 8.7

Vector: 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

Severity: High

EPSS

EPSS: 0.00161