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Dnsdist: [A crafted DNS packet can cause increased memory and CPU consumption] (CVE-2026-52682)

0
Medium
VulnerabilityCVE-2026-52682gcveosvubuntu-cve-2026-52682cve-2026-52682ubuntu-16-04-ltsubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-pro-22-04-ltsubuntu-24-04-ltsubuntu-pro-24-04-ltsubuntu-26-10ubuntu-26-04-lts
Published: 08/07/2026 (08/07/2026, 00:00:00 UTC)
Source: GCVE Database
Product: dnsdist

Description

A vulnerability in dnsdist allows a crafted DNS packet to cause increased memory and CPU consumption. This issue affects multiple specific versions of dnsdist. The severity is assessed as medium. No CVSS score is provided. There is no indication of known exploits in the wild or vendor-provided patches in the provided data.

Affected software

Ubuntu:16.04:LTSmore threats →ghsa
dnsdist
pkg:deb/ubuntu/dnsdist?arch=source&distro=xenial
Affected versions
=1.0.0~alpha2-1
Ubuntu:Pro:16.04:LTSmore threats →ghsa
pdns
pkg:deb/ubuntu/pdns?arch=source&distro=esm-apps/xenial
Affected versions
=3.4.5-1build2=3.4.6-2=3.4.6-3=3.4.7-1=3.4.7-2=4.0.0~alpha1-1=4.0.0~alpha2-2=4.0.0~alpha2-3=4.0.0~alpha2-3build1=4.0.0~alpha2-3ubuntu0.1~esm1
Ubuntu:Pro:16.04:LTSmore threats →ghsa
pdns-recursor
pkg:deb/ubuntu/pdns-recursor?arch=source&distro=esm-apps/xenial
Affected versions
=3.7.3-1=4.0.0~alpha1-1=4.0.0~alpha1-2=4.0.0~alpha2-2=4.0.0~alpha2-2ubuntu0.1=4.0.0~alpha2-2ubuntu0.1+esm1
Ubuntu:Pro:18.04:LTSmore threats →ghsa
dnsdist
pkg:deb/ubuntu/dnsdist?arch=source&distro=esm-apps/bionic
Affected versions
=1.2.0-1=1.2.0-3=1.2.1-1=1.2.1-1build1=1.2.1-1ubuntu0.1~esm1
Ubuntu:Pro:18.04:LTSmore threats →ghsa
pdns
pkg:deb/ubuntu/pdns?arch=source&distro=esm-apps/bionic
Affected versions
=4.0.4-2=4.0.4-2build1=4.0.5-1=4.1.0-1=4.1.0-2=4.1.0-2build1=4.1.1-1=4.1.1-1ubuntu0.1~esm1
Ubuntu:Pro:18.04:LTSmore threats →ghsa
pdns-recursor
pkg:deb/ubuntu/pdns-recursor?arch=source&distro=esm-apps/bionic
Affected versions
=4.0.6-1=4.0.6-1build1=4.0.7-1=4.1.1-1=4.1.1-1build1=4.1.1-2=4.1.1-2ubuntu0.1~esm1
Ubuntu:Pro:20.04:LTSmore threats →ghsa
dnsdist
pkg:deb/ubuntu/dnsdist?arch=source&distro=esm-apps/focal
Affected versions
=1.4.0~rc3-1=1.4.0-1=1.4.0-1build1=1.4.0-1build2=1.4.0-1ubuntu0.1~esm1
Ubuntu:Pro:20.04:LTSmore threats →ghsa
pdns
pkg:deb/ubuntu/pdns?arch=source&distro=esm-apps/focal
Affected versions
=4.1.6-3build1=4.2.0-1=4.2.1-1=4.2.1-1build1=4.2.1-1build2=4.2.1-1ubuntu0.1~esm1
Ubuntu:Pro:20.04:LTSmore threats →ghsa
pdns-recursor
pkg:deb/ubuntu/pdns-recursor?arch=source&distro=esm-apps/focal
Affected versions
=4.2.0-6=4.2.1-1=4.2.1-1build1=4.2.1-1build2=4.2.1-1ubuntu0.1~esm1
Ubuntu:Pro:22.04:LTSmore threats →ghsa
dnsdist
pkg:deb/ubuntu/dnsdist?arch=source&distro=esm-apps/jammy
Affected versions
=1.5.1-3build2=1.6.1-1build1=1.6.1-1ubuntu0.1~esm1=1.6.1-1ubuntu0.1~esm2
Ubuntu:Pro:22.04:LTSmore threats →ghsa
pdns
pkg:deb/ubuntu/pdns?arch=source&distro=esm-apps/jammy
Affected versions
=4.4.1-1build1=4.4.1-3=4.4.1-4=4.5.2-1build1=4.5.3-1=4.5.3-1ubuntu0.1~esm1
Ubuntu:Pro:22.04:LTSmore threats →ghsa
pdns-recursor
pkg:deb/ubuntu/pdns-recursor?arch=source&distro=esm-apps/jammy
Affected versions
=4.4.2-3=4.6.0-1ubuntu1=4.6.0-1ubuntu1+esm1
Ubuntu:24.04:LTSmore threats →ghsa
pdns
pkg:deb/ubuntu/pdns?arch=source&distro=noble
Affected versions
=4.8.1-1build1=4.8.3-2=4.8.3-2build1=4.8.3-3=4.8.3-4=4.8.3-4build2=4.8.3-4build3
Ubuntu:24.04:LTSmore threats →ghsa
pdns-recursor
pkg:deb/ubuntu/pdns-recursor?arch=source&distro=noble
Affected versions
=4.9.0-2=4.9.1-4=4.9.2-1=4.9.2-1build1=4.9.2-2=4.9.3-1=4.9.3-1build2=4.9.3-1build3
Ubuntu:Pro:24.04:LTSmore threats →ghsa
dnsdist
pkg:deb/ubuntu/dnsdist?arch=source&distro=esm-apps/noble
Affected versions
=1.8.0-1=1.8.2-1=1.8.2-2=1.8.2-3=1.8.3-1=1.8.3-2=1.8.3-2build1=1.8.3-2build2=1.8.3-2ubuntu0.1~esm1
Ubuntu:26.10more threats →ghsa
dnsdist
pkg:deb/ubuntu/dnsdist?arch=source&distro=stonking
Affected versions
=2.0.2-1build1=2.0.5-2ubuntu1=2.0.5-2ubuntu3
Ubuntu:26.10more threats →ghsa
pdns
pkg:deb/ubuntu/pdns?arch=source&distro=stonking
Affected versions
=5.0.2-1build1=5.0.5-4=5.1.0-1=5.1.1-1=5.1.1-2=5.1.1-3=5.1.2-1=5.1.3-1=5.1.4-1
Ubuntu:26.10more threats →ghsa
pdns-recursor
pkg:deb/ubuntu/pdns-recursor?arch=source&distro=stonking
Affected versions
=5.3.5-1=5.4.3-1=5.4.5-1
Ubuntu:26.04:LTSmore threats →ghsa
dnsdist
pkg:deb/ubuntu/dnsdist?arch=source&distro=resolute
Affected versions
=1.9.10-1=2.0.1-1=2.0.2-1=2.0.2-1build1
Ubuntu:26.04:LTSmore threats →ghsa
pdns
pkg:deb/ubuntu/pdns?arch=source&distro=resolute
Affected versions
=5.0.0-2=5.0.1-1=5.0.2-1=5.0.2-1build1
Ubuntu:26.04:LTSmore threats →ghsa
pdns-recursor
pkg:deb/ubuntu/pdns-recursor?arch=source&distro=resolute
Affected versions
=5.2.4-2build2=5.3.1-1=5.3.3-1=5.3.4-1=5.3.4-1build1=5.3.4-2=5.3.5-1

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/18/2026, 00:56:07 UTC

Technical Analysis

The dnsdist software is vulnerable to a crafted DNS packet that can lead to increased memory and CPU consumption. This vulnerability affects a wide range of specific dnsdist versions as enumerated in the affectedVersions list. The increased resource consumption could potentially degrade service performance or availability. No further technical details or exploitation methods are provided in the source data.

Potential Impact

The vulnerability can cause increased memory and CPU usage on affected dnsdist instances when processing specially crafted DNS packets. This may lead to degraded performance or denial of service conditions due to resource exhaustion. There is no evidence of active exploitation in the wild based on the provided information.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor communications for updates. Until a fix is available, consider limiting exposure to untrusted DNS traffic or applying rate limiting to mitigate potential resource exhaustion.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-52682
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:16.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]

Threat ID: 6ad3f6082cdf04f6566640c2

Added to database: 10/17/2026, 22:26:16 UTC

Last enriched: 10/18/2026, 00:56:07 UTC

Last updated: 10/18/2026, 00:56:07 UTC

Views: 4

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