CVE-2026-119116: A use-after-free and double-free issue in the SetClient command handler of the kmstool-enclave sample applicat

Q: How do I fix CVE-2026-119116?

kmstool-enclave: upgrade to 0.4.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-119116 being exploited?

CVE-2026-119116 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-119116 affect?

CVE-2026-119116 affects kmstool-enclave. Severity is high (CVSS 7.8). 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 mem

Q: How urgent is CVE-2026-119116?

Priority 32/100. High severity; On your watchlist

Routine

HIGH 7.8WATCHLISTUPGRADE

CVE-2026-119116 is a high-severity flaw (CVSS 7.8) affecting kmstool-enclave. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 i

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-416, CWE-415
Published	2026-10-30
Last modified	2026-10-30

Publisher (CNA): AMZN · Vendor: aws · Source: CVE Program record (NVD analysis pending)

Last updated 2026-10-30 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-30 16:10 UTCPublished CVE record published
2026-10-30 16:10 UTCUpdated Record last modified

aws kmstool-enclave UPGRADE

Affected: < 0.4.6

Fixed in: 0.4.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy kmstool-enclave || rpm -q kmstool-enclave || kmstool-enclave --version

2. UPGRADE to 0.4.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kmstool-enclave

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kmstool-enclave

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Advisories and coverage

Official advisories

AWS Security Bulletins: CVE-2026-119116 and CVE-2026-119148 - Issues in AWS Nitro Enclaves SDK for C 2026-10-30

Research and news

VulDB Recent Entries: CVE-2026-119116 | AWS kmstool-enclave up to 0.4.5 SetClient Command SetClient command handler use after free 2026-10-30

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-119116?

kmstool-enclave: upgrade to 0.4.6. Exact commands for each OS are on this page.

Is CVE-2026-119116 being exploited?

CVE-2026-119116 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-119116 affect?

CVE-2026-119116 affects kmstool-enclave. Severity is high (CVSS 7.8). 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 mem

How urgent is CVE-2026-119116?

Priority 32/100. High severity; On your watchlist

Software pages

AWS vulnerabilities

References

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