DEBIAN-CVE-2026-93007

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Source
https://security-tracker.debian.org/tracker/CVE-2026-93007
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93007.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-93007
Upstream
  • CVE-2026-93007
Published
2026-10-29T13:17:15Z
Modified
2026-10-31T09:47:35Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
[none]
Details

A flaw was found in dnsmasq. The TCP DNS service uses a small fixed pool of child processes and does not set a receive timeout on client connections. A remote attacker can open idle TCP connections to port 53 and occupy the entire pool, preventing new TCP DNS connections and DNSSEC validation that requires TCP fallback. UDP DNS resolution continues, and occupied slots are released after a fixed lifetime.

References

Affected packages

Debian:12 / dnsmasq

Package

Name
dnsmasq
Purl
pkg:deb/debian/dnsmasq?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.89-1
2.90-1
2.90-2
2.90-3
2.90-4~deb12u1
2.90-4~deb12u2
2.90-4
2.90-5
2.90-6
2.90-7
2.91~test6-1
2.91~test9-1
2.91-1
2.92~rc1-1
2.92~rc3-1
2.92-1~exp1
2.92-1
2.92-1+exp1
2.92-2
2.92-3
2.92-4
2.92-5
2.93-1
2.93-2
2.93-3

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93007.json"

Debian:13 / dnsmasq

Package

Name
dnsmasq
Purl
pkg:deb/debian/dnsmasq?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.91-1
2.91-1+deb13u1
2.91-1+deb13u2
2.92~rc1-1
2.92~rc3-1
2.92-1~exp1
2.92-1
2.92-1+exp1
2.92-2
2.92-3
2.92-4
2.92-5
2.93-1
2.93-2
2.93-3

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93007.json"

Debian:14 / dnsmasq

Package

Name
dnsmasq
Purl
pkg:deb/debian/dnsmasq?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.91-1
2.92~rc1-1
2.92~rc3-1
2.92-1~exp1
2.92-1
2.92-1+exp1
2.92-2
2.92-3
2.92-4
2.92-5
2.93-1
2.93-2
2.93-3

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93007.json"