| Name | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| busybox (PTS) | bookworm | 1:1.35.0-4+deb12u1 | vulnerable |
| trixie | 1:1.37.0-6 | vulnerable | |
| forky, sid | 1:1.38.0-3 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| busybox | source | (unstable) | (unfixed) |
[trixie] - busybox <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2531346