A data engineer set up an AWS Lambda function to read an object that is stored in an Amazon S3 bucket. The object is encrypted by an AWS KMS key. The data engineer configured the Lambda function's exe

If the S3 bucket permissions were misconfigured, the Lambda function would typically encounter an access denied error for the S3 object itself, rather than specifically failing to retrieve its content due to encryption.

While an outdated SDK could potentially cause issues, it's a less common and less direct cause for failing to access KMS-encrypted S3 objects compared to a missing KMS permission.

Accessing S3 buckets from a different AWS Region is supported by AWS services, provided the necessary permissions are configured, and is not inherently a reason for failure without further context.

When an S3 object is encrypted using an AWS KMS key, any principal attempting to access and decrypt that object (like an AWS Lambda function) must have explicit `kms:Decrypt` permissions on the KMS key, in addition to S3 read permissions.