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github/aws-lcTiming Side-Channel in AES-CCM Tag Verification in AWS-LC

Risk 31
Severity
8.2
EPSS
0.03%
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

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: EVPaes128ccm, EVPaes192ccm, and EVPaes256ccm.

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

First published (updated )
CVE-2026-3337

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