CVE-2026-93010

Dnsmasq: dnsmasq: --leasequery without address argument applies no source address check

Products / packages Red Hat Ceph Storage 9 · Red Hat Enterprise Linux 10 · Red Hat Enterprise Linux 6 · 7 more

Published 29/10/2026, 13:13:23 UTC

Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 21:30:34 UTC

redhat · CVSS:3.1 · 4.3

Assessment vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Severity

medium4.3

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Source guidance available

Review the recorded instructions. Guidance may be a workaround rather than a fixed version.

What this means

A flaw in dnsmasq allows a local network host to request DHCP lease records when leasequery is enabled without allowed source addresses. The server does not check the query sender. A host can learn assigned addresses, MAC addresses, hostnames, and lease metadata. The feature is off by default.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Red Hat · redhat

Red Hat Ceph Storage 9

0 ranges

redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:ceph_storage:9

Red Hat · redhat

Red Hat Enterprise Linux 10

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redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:enterprise_linux:10

Red Hat · redhat

Red Hat Enterprise Linux 6

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redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/o:redhat:rhel_els:6

Red Hat · redhat

Red Hat Enterprise Linux 7

0 ranges

redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/o:redhat:rhel_els:7

Red Hat · redhat

Red Hat Enterprise Linux 8

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redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:enterprise_linux:8

Red Hat · redhat

Red Hat Enterprise Linux 9

0 ranges

redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:enterprise_linux:9

Red Hat · redhat

Red Hat OpenShift Container Platform 4

0 ranges

redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:openshift:4

Red Hat · redhat

Red Hat OpenShift Container Platform 4

0 ranges

redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:openshift:4

Red Hat · redhat

Red Hat OpenShift Container Platform 4

0 ranges

redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:openshift:4

Red Hat · redhat

Red Hat OpenShift Container Platform 4

0 ranges

redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:openshift:4

Red Hat · redhat

Red Hat OpenShift Container Platform 5

0 ranges

redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:openshift:5

Red Hat · redhat

Red Hat OpenShift Container Platform 5

0 ranges

redhat version evidence

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Compare with this publisher’s ranges. This does not inspect your installation.

Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:openshift:5

Red Hat · redhat

Red Hat OpenStack Platform 13 (Queens)

0 ranges

redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:openstack:13

Red Hat · redhat

Red Hat OpenStack Platform 18.0

0 ranges

redhat version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:openstack:18.0

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

The following measures reduce risk:

Prefer --leasequery=<addr>[/prefix] so only designated relays may query.
If leasequery is not needed, do not enable it. It is off by default.
If unrestricted leasequery is required, use firewall rules to limit which hosts can send DHCP packets to dnsmasq.

redhat guidance ↗

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

A flaw was found in dnsmasq. When DHCP leasequery is enabled without listing allowed source addresses, the server does not check who sent the query. A host on the local network can request DHCP lease records and learn assigned addresses, MAC addresses, hostnames, and related lease metadata. The feature is off unless an administrator turns it on.

References

2 sources

access.redhat.com/security/cve/CVE-2026-93010

Security advisoryredhat

bugzilla.redhat.com/show_bug.cgi

Source referenceredhat

Inside the record

Evidence available

Package identity · not supplied

Version evidence · not supplied

Remediation guidance

Weakness classification

Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-93010

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-862 ↗

Missing Authorization

redhat

Contributing organizations · 2

redhat

Assigning organization

2026-11-06

CISA-ADP

Additional data publisher

2026-11-03

Timeline

All times UTC

29 Oct 2026, 13:13
Advisory published
Publication date supplied by the source.
6 Nov 2026, 19:57
Source updated
Latest modification date supplied by the source.
6 Nov 2026, 22:20
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes

CVE · CVE-2026-930102026-11-06

Observed 2026-11-06T22:20:46.257Z · upstream updated 2026-11-06T19:57:48.987Z

Product or version evidence changed

before

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after

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CVE · CVE-2026-930102026-11-03

Observed 2026-11-03T15:41:05.815Z · upstream updated 2026-11-03T15:31:37.276Z

Prioritization updated

before

[]

after

[
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-11-03T15:31:20.340142Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

CVE · CVE-2026-930102026-10-30

Observed 2026-10-30T08:11:06.682Z · upstream updated 2026-10-30T08:05:53.237Z

Product or version evidence changed

before

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    "name": "Red Hat Ceph Storage 9",
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]

after

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    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ],
    "source": "redhat",
    "url": "https://www.cve.org/CVERecord?id=CVE-2026-93010"
  },
  {
    "vendor": "Red Hat",
    "name": "Red Hat Enterprise Linux 8",
    "platforms": [],
    "versions": [],
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8"
    ],
    "source": "redhat",
    "url": "https://www.cve.org/CVERecord?id=CVE-2026-93010"
  },
  {
    "vendor": "Red Hat",
    "name": "Red Hat Enterprise Linux 9",
    "platforms": [],
    "versions": [],
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9"
    ],
    "source": "redhat",
    "url": "https://www.cve.org/CVERecord?id=CVE-2026-93010"
  },
  {
    "vendor": "Red Hat",
    "name": "Red Hat OpenShift Container Platform 4",
    "platforms": [],
    "versions": [],
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ],
    "source": "redhat",
    "url": "https://www.cve.org/CVERecord?id=CVE-2026-93010"
  },
  {
    "vendor": "Red Hat",
    "name": "Red Hat OpenShift Container Platform 4",
    "platforms": [],
    "versions": [],
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ],
    "source": "redhat",
    "url": "https://www.cve.org/CVERecord?id=CVE-2026-93010"
  },
  {
    "vendor": "Red Hat",
    "name": "Red Hat OpenShift Container Platform 4",
    "platforms": [],
    "versions": [],
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ],
    "source": "redhat",
    "url": "https://www.cve.org/CVERecord?id=CVE-2026-93010"
  },
  {
    "vendor": "Red Hat",
    "name": "Red Hat OpenShift Container Platform 4",
    "platforms": [],
    "versions": [],
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:openshift:4"
    ],
    "source": "redhat",
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  },
  {
    "vendor": "Red Hat",
    "name": "Red Hat OpenShift Container Platform 5",
    "platforms": [],
    "versions": [],
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:openshift:5"
    ],
    "source": "redhat",
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  },
  {
    "vendor": "Red Hat",
    "name": "Red Hat OpenShift Container Platform 5",
    "platforms": [],
    "versions": [],
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:openshift:5"
    ],
    "source": "redhat",
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  },
  {
    "vendor": "Red Hat",
    "name": "Red Hat OpenStack Platform 13 (Queens)",
    "platforms": [],
    "versions": [],
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:openstack:13"
    ],
    "source": "redhat",
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  },
  {
    "vendor": "Red Hat",
    "name": "Red Hat OpenStack Platform 18.0",
    "platforms": [],
    "versions": [],
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/a:redhat:openstack:18.0"
    ],
    "source": "redhat",
    "url": "https://www.cve.org/CVERecord?id=CVE-2026-93010"
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

Reading the signals

Severity · CVSS: Technical impact and attack conditions. The headline is the highest imported catalog score; sources may disagree.
Observed exploitation · KEV: An absent or unavailable KEV listing does not establish that exploitation has not occurred.
Predicted exploitation · EPSS: No EPSS estimate available in this record.

CISA-ADP · SSVC

CISA Coordinator · 2026-11-03

Exploitation: none
Automatable: no
Technical Impact: partial

SSVC describes the publisher’s decision context. Your organization’s exposure and priorities may differ.

Record identifiers

Aliases: None recorded

Source evidence

Request a correction or dispute

Start with the assigning organization for this record. Include the CVE ID, the disputed information, and supporting evidence. A dispute does not itself reject a record.

Find the responsible CNA →Official dispute and escalation process ↗

CVE CVE-2026-93010

Enrichment coverage

NVDAvailable

Checked 30/10/2026, 08:15:30 UTC

GHSAAvailable

Checked 30/10/2026, 08:15:30 UTC

EUVDAvailable

Checked 30/10/2026, 08:15:30 UTC

EPSSNo result

Checked 30/10/2026, 08:15:30 UTC

Additional source evidence

NVD · CVE-2026-93010

CVSS 4.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Checked 30/10/2026, 08:15:30 UTC

GitHub Advisory Database · GHSA-2r7h-m3qh-f4cj

CVSS 4.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Checked 30/10/2026, 08:15:30 UTC

ENISA EUVD · EUVD-2026-112825

CVSS 4.3 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Checked 30/10/2026, 08:15:30 UTC

Sponsored by MoxsoBuild security habits with adaptive training and phishing simulations.View as JSON

Dnsmasq: dnsmasq: --leasequery without address argument applies no source address check

Severity and exploitation

What this means

Attack conditions

Affected versions

Red Hat Ceph Storage 9

affected

unaffected

unknown

Red Hat Enterprise Linux 10

affected

unaffected

unknown

Red Hat Enterprise Linux 6

affected

unaffected

unknown

Red Hat Enterprise Linux 7

affected

unaffected

unknown

Red Hat Enterprise Linux 8

affected

unaffected

unknown

Red Hat Enterprise Linux 9

affected

unaffected

unknown

Red Hat OpenShift Container Platform 4

affected

unaffected

unknown

Red Hat OpenShift Container Platform 4

affected

unaffected

unknown

Red Hat OpenShift Container Platform 4

affected

unaffected

unknown

Red Hat OpenShift Container Platform 4

affected

unaffected

unknown

Red Hat OpenShift Container Platform 5

affected

unaffected

unknown

Red Hat OpenShift Container Platform 5

affected

unaffected

unknown

Red Hat OpenStack Platform 13 (Queens)

affected

unaffected

unknown

Red Hat OpenStack Platform 18.0

affected

unaffected

unknown

What to do

Public exploit evidence

Original source description

References

Inside the record

Evidence available

Original records

Underlying weaknesses

Timeline

Advisory published

Source updated

Last imported by cve.new

What changed