| Name | CVE-2025-51495 |
| Description | An integer overflow vulnerability exists in the WebSocket component of Mongoose 7.5 thru 7.17. By sending a specially crafted WebSocket request, an attacker can cause the application to crash. If downstream vendors integrate this component improperly, the issue may lead to a buffer overflow. |
| 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-1 | | | |
Notes
- mongoose <not-affected> (Fixed before or with initial upload)
[trixie] - swupdate <no-dsa> (Minor issue)
[bookworm] - swupdate <no-dsa> (Minor issue)
[bullseye] - swupdate <postponed> (Minor issue)
https://github.com/cesanta/mongoose/pull/3131
https://github.com/cesanta/mongoose/commit/cdc439bc38570048541b2ac6b9c326da87bf4a0a (7.18)