| Name | CVE-2026-101338 |
| Description | When a SVCB or HTTPS RR has filled the wire format RDATA up to the brim, another ECH parameter may overwrite the stack, and once beyond the limit, the base64 decoder can write attacker controlled data of unlimited size. Zone files which are written out by NSD itself, such as for zones for which the NSD instance is secondary, will not be formatted like this. The zone file must be fed to NSD directly, (but it could come, for example, from an operator controlled provisioning 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 | 1150930 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| nsd (PTS) | bookworm | 4.6.1-1 | vulnerable |
| trixie | 4.12.0-1 | vulnerable | |
| forky, sid | 4.15.2-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| nsd | source | (unstable) | (unfixed) | 1150930 |
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-101338.txt
https://www.openwall.com/lists/oss-security/2026/10/14/12