DEBIAN-CVE-2026-40211

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Source
https://security-tracker.debian.org/tracker/CVE-2026-40211
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40211.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-40211
Upstream
Published
2026-06-25T13:16:39.717Z
Modified
2026-07-10T04:00:07.701397161Z
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

An attacker can send crafted DNS over HTTP/3 queries, triggering an exception that prevents some buffer from being freed right away. The buffer will be freed at the end of the QUIC connection, but on some setups it might be possible to open enough concurrent DoH3 streams to trigger an out-of-memory condition, resulting in a denial of service.

References

Affected packages

Debian:11 / dnsdist

Package

Name
dnsdist
Purl
pkg:deb/debian/dnsdist?arch=source&distro=bullseye

Affected ranges

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

Affected versions

1.*
1.5.1-3
1.6.0-1
1.6.0-2
1.6.1-1
1.7.0-1
1.7.1-1
1.7.2-1
1.7.2-2
1.7.3-1
1.7.3-2
1.8.0-1
1.8.1-1
1.8.2-1
1.8.2-2
1.8.2-3
1.8.3-1
1.8.3-2
1.8.3-3
1.9.3-1
1.9.4-1
1.9.5-1
1.9.6-1
1.9.8-1
1.9.9-1
1.9.10-1
2.*
2.0.0~rc1-1
2.0.0~rc1-2
2.0.0~rc2-1
2.0.0-1
2.0.0-2
2.0.0-3
2.0.0-4
2.0.0-5
2.0.0-6
2.0.1-1
2.0.2-1
2.0.3-1
2.0.4-1
2.0.5-1
2.0.5-2
2.0.5-3
2.0.6-1
2.1.0-1
2.1.0-2

Ecosystem specific 

{
    "urgency": "end-of-life"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40211.json"

Debian:12 / dnsdist

Package

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

Affected ranges

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

Affected versions

1.*
1.7.3-2
1.8.0-1
1.8.1-1
1.8.2-1
1.8.2-2
1.8.2-3
1.8.3-1
1.8.3-2
1.8.3-3
1.9.3-1
1.9.4-1
1.9.5-1
1.9.6-1
1.9.8-1
1.9.9-1
1.9.10-1
2.*
2.0.0~rc1-1
2.0.0~rc1-2
2.0.0~rc2-1
2.0.0-1
2.0.0-2
2.0.0-3
2.0.0-4
2.0.0-5
2.0.0-6
2.0.1-1
2.0.2-1
2.0.3-1
2.0.4-1
2.0.5-1
2.0.5-2
2.0.5-3
2.0.6-1
2.1.0-1
2.1.0-2

Ecosystem specific 

{
    "urgency": "end-of-life"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40211.json"

Debian:13 / dnsdist

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.9.15-0+deb13u1

Affected versions

1.*
1.9.10-1
1.9.10-1+deb13u1
1.9.14-0+deb13u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40211.json"

Debian:14 / dnsdist

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.1.0-1

Affected versions

1.*
1.9.10-1
2.*
2.0.0~rc1-1
2.0.0~rc1-2
2.0.0~rc2-1
2.0.0-1
2.0.0-2
2.0.0-3
2.0.0-4
2.0.0-5
2.0.0-6
2.0.1-1
2.0.2-1
2.0.3-1
2.0.4-1
2.0.5-1
2.0.5-2
2.0.5-3
2.0.6-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40211.json"