| Name | CVE-2026-52684 |
| Description | If the auth responds very slowly and the records expire in between, the capping of TTLs is not enforced for lack of data. This does not happen on regular resolve as then then the child records are used immediately if not expired and thus valid, or the records are expired, and in that case not used. So this case can only happen if almost expired records are used to refresh the authoritative NS records. |
| 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) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| pdns-recursor (PTS) | bullseye | 4.4.2-3 | vulnerable |
| bookworm, bookworm (security) | 4.8.8-1+deb12u1 | vulnerable | |
| trixie | 5.2.11-0+deb13u1 | vulnerable | |
| trixie (security) | 5.2.12-0+deb13u1 | vulnerable | |
| forky | 5.4.3-1 | vulnerable | |
| sid | 5.4.4-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| pdns-recursor | source | bullseye | (unfixed) | end-of-life | ||
| pdns-recursor | source | bookworm | (unfixed) | end-of-life | ||
| pdns-recursor | source | (unstable) | (unfixed) |
[trixie] - pdns-recursor <no-dsa> (Minor issue)
[bookworm] - pdns-recursor <end-of-life> (see DSA 6045)
[bullseye] - pdns-recursor <end-of-life> (see DSA 6045)
https://github.com/PowerDNS/pdns/pull/17748
Fixed by: https://github.com/PowerDNS/pdns/commit/63f480d2072d85ff5cd6eeb324bd52bf5debd4f7