| Name | CVE-2026-2966 |
| Description | A weakness has been identified in Cesanta Mongoose up to 7.20. The impacted element is the function mg_sendnsreq of the file /src/dns.c of the component DNS Transaction ID Handler. Executing a manipulation of the argument random can lead to insufficiently random values. The attack can be launched remotely. The attack requires a high level of complexity. The exploitability is regarded as difficult. The exploit has been made available to the public and could be used for attacks. 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)