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.
History

Wed, 04 Mar 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Aws
Aws aws-lc
Aws aws-lc-fips
Vendors & Products Aws
Aws aws-lc
Aws aws-lc-fips

Wed, 04 Mar 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 03 Mar 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 02 Mar 2026 22:30:00 +0000

Type Values Removed Values Added
References

Mon, 02 Mar 2026 21:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Timing Side-Channel in AES-CCM Tag Verification in AWS-LC
Weaknesses CWE-208
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-03-03T20:04:27.577Z

Reserved: 2026-02-27T15:16:28.371Z

Link: CVE-2026-3337

cve-icon Vulnrichment

Updated: 2026-03-03T20:03:15.485Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-02T22:16:32.093

Modified: 2026-03-03T21:52:29.877

Link: CVE-2026-3337

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-03-02T21:20:08Z

Links: CVE-2026-3337 - Bugzilla