CVE catalog

CVE-2026-33593

A client can trigger a divide by zero error leading to…

[CVE catalog]

A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.

Severity
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
Source
[NVD] · [CVE record]
EPSS
0.38% · 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": "dnsdist",
      "status": "fixed",
      "release": "sid",
      "version": "2.1.3-1"
    },
    {
      "name": "dnsdist",
      "status": "fixed",
      "release": "forky",
      "version": "2.1.3-1"
    },
    {
      "name": "dnsdist",
      "status": "fixed",
      "release": "trixie",
      "version": "1.9.16-0+deb13u1"
    },
    {
      "name": "dnsdist",
      "status": "fixed",
      "release": "trixie-security",
      "version": "1.9.16-0+deb13u1"
    },
    {
      "name": "dnsdist",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "1.7.3-2"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "dnsdist",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.4-1"
    },
    {
      "bug": null,
      "name": "dnsdist",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "2.0.4-1"
    },
    {
      "bug": null,
      "name": "dnsdist",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "1.9.14-0+deb13u1"
    },
    {
      "bug": null,
      "name": "dnsdist",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "end-of-life",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "dnsdist",
      "ecosystem": "cpe",
      "fixed_version": "not yet fixed"
    },
    {
      "name": "dnsdist",
      "ecosystem": "cpe",
      "fixed_version": "1.9.13"
    },
    {
      "name": "dnsdist",
      "ecosystem": "cpe",
      "fixed_version": "2.0.4"
    },
    {
      "name": "dnsdist",
      "ranges": [
        {
          "fixed": "2.0.4",
          "introduced": "2.0.0",
          "last_affected": "",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "2.0.4",
      "provider_record_id": "NVD-CVE-2026-33593"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

  • [dnsdist]Unknown
    Details (2)

    • 1.7.3-2 · amd64 · bookworm

      Affected

      nvd · dnsdist · debian · bookworm; nvd · dnsdist · debian · 12

    • 1.7.3-2 · arm64 · bookworm

      Affected

      nvd · dnsdist · debian · bookworm; nvd · dnsdist · debian · 12

[Debian 13 (Trixie)]

  • [dnsdist]Unknown
    Details (4)

    • 1.9.15-0+deb13u1 · amd64 · trixie

      Fixed · Fixed: 1.9.14-0+deb13u1

      nvd · dnsdist · debian · 13

    • 1.9.15-0+deb13u1 · arm64 · trixie

      Fixed · Fixed: 1.9.14-0+deb13u1

      nvd · dnsdist · debian · 13

    • 1.9.16-0+deb13u1 · amd64 · trixie-security

      Fixed · Fixed: 1.9.14-0+deb13u1

      nvd · dnsdist · debian · 13

    • 1.9.16-0+deb13u1 · arm64 · trixie-security

      Fixed · Fixed: 1.9.14-0+deb13u1

      nvd · dnsdist · debian · 13

Observed:

References

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