Vulnerability in Red Hat Hardened Images

[ Description ]Official description

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund23 Sep 2026WID-SEC-2026-3557

  BusyBox: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-88839CVE-2026-88837CVE-2026-88831+4 more CVEs

[ References ]References

• access.redhat.com/errata/RHSA-2026:72111
• access.redhat.com/security/cve/CVE-2026-88831
• bugzilla.redhat.com/show_bug.cgi