DEBIAN-CVE-2026-4893

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Source
https://security-tracker.debian.org/tracker/CVE-2026-4893
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4893.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-4893
Upstream
Published
2026-05-11T18:16:41Z
Modified
2026-09-14T17:03:16Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
[none]
Details

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.

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
Fixed
2.90-4~deb12u2

Affected versions

2.*
2.89-1
2.90-1
2.90-2
2.90-3
2.90-4~deb12u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4893.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
Fixed
2.91-1+deb13u1

Affected versions

2.*
2.91-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4893.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
Fixed
2.92-5

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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4893.json"