HIGHCVE-2026-3337Published Modified CNA AMZN
CVE-2026-3337: Timing Side-Channel in AES-CCM Tag Verification in AWS-LC
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.
Metrics
- CVSS v4.0
- 8.2
- Severity
- HIGH
- Fixed in
- 1.69.0
- Affected Products
- 2
Affected packages
- AWS / AWS-LC< 1.69.0 (from 1.21.0)
- AWS / AWS-LC-FIPS< 3.2.0 (from 3.0.0)
CVSS 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:NReferences