Astra Linux – Vulnerability in dovecot

Sending the “NOOP ...” command with 4000 opening and closing parentheses results in an additional 1MB of memory usage. Longer commands will cause the client to disconnect. This 1MB of memory can be reserved for longer periods of time by not sending the command that ends with LF. Thus, an attacker...

CVE-2026-27857

Sending "NOOP ..." command with 4000 parenthesis open+close results in 1MB extra memory usage. Longer commands will result in client disconnection. This 1 MB can be left allocated for longer time periods by not sending the command ending LF. So attacker could connect possibly from even a single I...

CVE-2026-27857: Uncontrolled Resource Consumption

Sending "NOOP ..." command with 4000 parenthesis open+close results in 1MB extra memory usage. Longer commands will result in client disconnection. This 1 MB can be left allocated for longer time periods by not sending the command ending LF. So attacker could connect possibly from even a single I...