SB20260731184 - Anolis OS update for dovecot
Published: July 31, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Resource exhaustion (CVE-ID: CVE-2026-42006)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in imap-login when processing excessive bracing over IMAP. A remote user can send excessive bracing to cause a denial of service.
The issue remained reachable because an earlier fix blocked closing braces, but open braces could still bypass the limit.
2) Resource exhaustion (CVE-ID: CVE-2026-27857)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:U/U:Green
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in imap-login process when handling malformed NOOP commands. A remote user can send a specially crafted command with excessive parentheses to cause a denial of service.
Remediation
Install update from vendor's website.