| Name | CVE-2026-91018 |
| Description | lwIP (Lightweight IP) has a double free vulnerability, which could crash the system, cause a DoS, memory corruption, or allow code execution on the victim system. |
| 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) |
| Debian Bugs | 1148822 |
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+dfsg1-8 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| lwip | source | (unstable) | 2.2.1+dfsg1-8 | | | 1148822 |
Notes
[trixie] - lwip <no-dsa> (Minor issue)
[bookworm] - lwip <postponed> (Minor issue; needs an app-configured 6LoWPAN netif, no reverse dependencies)
Fixed by: https://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=f873b6295933e4149a2132adf3e9a2d2a676a5ec