# CVE-2026-4428: amazon-efs-utils: Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-4428: 	A logic e...

CVE-2026-4428 is fixed in 5 products on 1 platform, first by ALAS2023-2026-1564, released April 13, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-4428
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 13, 2026

## Description

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-4428: 	A logic error in CRL distribution point validation in AWS-LC before 1.71.0 causes partitioned CRLs to be incorrectly rejected as out of scope, which allows  a revoked certificate to bypass certificate revocation checks.  To remediate this issue, users should upgrade to AWS-LC 1.71.0 or AWS-LC-FIPS-3.3.0.  CVE-2026-3338: 	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.  CVE-2026-3337: 	Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.     The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.     Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.  CVE-2026-3336: 	Improper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer.  Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.  CVE-2026-25727: 	time provides date and time handling in Rust. From 0.3.6 to before 0.3.47, when user-provided input is provided to any type that parses with the RFC 2822 format, a denial of service attack via stack exhaustion is possible. The attack relies on formally deprecated and rarely-used features that are part of the RFC 2822 format used in a malicious manner. Ordinary, non-malicious input will never encounter this scenario. A limit to the depth of recursion was added in v0.3.47. From this version, an error will be returned rather than exhausting the stack.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | amazon-efs-utils amzn 2023 | 3.0.0-4.amzn2023 | [ALAS2023-2026-1564](https://patchblox.com/security/data/fix/linux/alas2023-2026-1564.md) | Apr 13, 2026 |
| Linux | aws-nitro-tpm-tools amzn 2023 | 1.1.2-1.amzn2023 | [ALAS2023-2026-1905](https://patchblox.com/security/data/fix/linux/alas2023-2026-1905.md) | Jul 6, 2026 |
| Linux | mount-s3 amzn 2023 | 1.22.3-1.amzn2023 | [ALAS2023-2026-1655](https://patchblox.com/security/data/fix/linux/alas2023-2026-1655.md) | May 11, 2026 |
| Linux | mount-s3-debuginfo amzn 2023 | 1.22.3-1.amzn2023 | [ALAS2023-2026-1655](https://patchblox.com/security/data/fix/linux/alas2023-2026-1655.md) | May 11, 2026 |
| Linux | mount-s3-debugsource amzn 2023 | 1.22.3-1.amzn2023 | [ALAS2023-2026-1655](https://patchblox.com/security/data/fix/linux/alas2023-2026-1655.md) | May 11, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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