| Name | CVE-2026-87121 |
| Description | lwIP TCP/IP Stack MQTT is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device. |
| 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) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| lwip (PTS) | bookworm | 2.1.3+dfsg1-2 | vulnerable |
| trixie | 2.2.1+dfsg1-1+deb13u1 | vulnerable |
| forky, sid | 2.2.1+dfsg1-7 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| lwip | source | (unstable) | (unfixed) | | | |
Notes
Fixed by: https://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=f89407ea711879c04d91c92b35d67be78bbaf0f1