CVE catalog

CVE-2026-52684

If the auth responds very slowly and the records…

[CVE catalog]

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.

Severity
Low · CVSS 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Published
Source
[NVD] · [CVE record]
EPSS
0.22% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [
    {
      "name": "pdns-recursor",
      "status": "vulnerable",
      "release": "sid",
      "version": "5.4.9-1"
    },
    {
      "name": "pdns-recursor",
      "status": "vulnerable",
      "release": "forky",
      "version": "5.4.8-1"
    },
    {
      "name": "pdns-recursor",
      "status": "vulnerable",
      "release": "trixie",
      "version": "5.2.13-0+deb13u1"
    },
    {
      "name": "pdns-recursor",
      "status": "vulnerable",
      "release": "trixie-security",
      "version": "5.2.13-0+deb13u1"
    },
    {
      "name": "pdns-recursor",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "4.8.8-1+deb12u1"
    },
    {
      "name": "pdns-recursor",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "4.8.8-1+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1142852,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1142852,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1142852,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1142852,
      "name": "pdns-recursor",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "end-of-life",
      "fixed_version": ""
    }
  ],
  "distribution_packages": []
}

[Debian bug #1142852]

Publisher notes

[trixie] pdns-recursor: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [pdns-recursor]Unknown
    Details (4)

    • 4.8.8-1+deb12u1 · amd64 · bookworm

      Affected

      nvd · pdns-recursor · debian · bookworm; nvd · pdns-recursor · debian · 12

    • 4.8.8-1+deb12u1 · arm64 · bookworm

      Affected

      nvd · pdns-recursor · debian · bookworm; nvd · pdns-recursor · debian · 12

    • 4.8.8-1+deb12u1 · amd64 · bookworm-security

      Affected

      nvd · pdns-recursor · debian · bookworm; nvd · pdns-recursor · debian · 12

    • 4.8.8-1+deb12u1 · arm64 · bookworm-security

      Affected

      nvd · pdns-recursor · debian · bookworm; nvd · pdns-recursor · debian · 12

[Debian 13 (Trixie)]

  • [pdns-recursor]Unknown
    Details (4)

    • 5.2.11-0+deb13u1 · amd64 · trixie

      Affected

      nvd · pdns-recursor · debian · 13

    • 5.2.11-0+deb13u1 · arm64 · trixie

      Affected

      nvd · pdns-recursor · debian · 13

    • 5.2.13-0+deb13u1 · amd64 · trixie-security

      Affected

      nvd · pdns-recursor · debian · 13

    • 5.2.13-0+deb13u1 · arm64 · trixie-security

      Affected

      nvd · pdns-recursor · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]