CVE-2026-88831

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.

Affected Platforms

Weakness Type

CWE-636

References

• https://access.redhat.com/security/cve/CVE-2026-88831
• https://bugzilla.redhat.com/show_bug.cgi?id=2531346