CVE-2026-3338 — PKCS7_verify Signature Validation Bypass in AWS-LC

Affected: AWS-LC, Red Hat Trusted Artifact Signer 1.3, Red Hat Confidential Compute Attestation, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4, Red Hat OpenShift Update Service, Red Hat Trusted Profile Analyzer

Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.

Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.

GHSA-hfpc-8r3f-gw53 — AWS-LC has PKCS7_verify Signature Validation Bypass

Affected: crates.io: aws-lc-sys

### Summary AWS-LC is an open-source, general-purpose cryptographic library.

### Impact Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.

Customers of AWS services do not need to take action. aws-lc-sys contains code from AWS-LC. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.

#### Impacted versions: aws-lc-sys versions: >= 0.24.0, < 0.38.0

### Patches The patch is included in v0.38.0

### Workarounds There is no workaround. Applications using aws-lc-sys should upgrade to the most recent release of aws-lc-sys.

### Resources If there are any questions or comments about this advisory, contact [AWS/Amazon] Security via the [vulnerability reporting page](https://aws.amazon.com/security/vulnerability-reporting) or directly via email to [aws-security@amazon.com](mailto:aws-security@amazon.com). Please do not create a public GitHub issue.

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CVE-2026-3338 — PKCS7_verify Signature Validation Bypass in AWS-LC

GHSA-hfpc-8r3f-gw53 — AWS-LC has PKCS7_verify Signature Validation Bypass