| Name | CVE-2026-2967 |
| Description | A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way. |
| 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 |
|---|
| mongoose (PTS) | forky, sid | 7.21+ds-2 | fixed |
| swupdate (PTS) | bullseye | 2020.11-2+deb11u1 | vulnerable |
| bookworm | 2022.12+dfsg-4+deb12u2 | vulnerable |
| trixie | 2024.12.1+dfsg-3+deb13u2 | vulnerable |
| forky, sid | 2025.12+dfsg-10 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| mongoose | source | (unstable) | (not affected) | | | |
| swupdate | source | (unstable) | 2025.12+dfsg-10 | | | |
Notes
- mongoose <not-affected> (Fixed before or with initial upload, also see bug #1135115)
[trixie] - swupdate <no-dsa> (Minor issue)
[bookworm] - swupdate <no-dsa> (Minor issue)
[bullseye] - swupdate <postponed> (Minor issue)