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 ↗

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

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

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