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5.3
CVE-2026-24030PATCHED
powerdns · dnsdist

Unbounded memory allocation for DoQ and DoH3

Description

An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.

Affected Products

VendorProductVersions
powerdnsdnsdist1.9.0, 2.0.0

References

  • https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html

Related News (2 articles)

Tier C
VulDB5h ago
CVE-2026-24030 | PowerDNS DNSdist up to 1.9.11/2.0.2 HTTP3 denial of service
→ No new info (linked only)
Tier B
BSI Advisories6h ago
[NEU] [hoch] PowerDNS: Mehrere Schwachstellen
→ No new info (linked only)
CVSS 3.15.3 MEDIUM
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA KEV❌ No
Actively exploited❌ No
Patch available1.9.12, 2.0.3
PublishedMar 31, 2026
Last enriched4h agov2
Trending Score33
Source articles2
Independent2
Info Completeness8/14
Missing: epss, cwe, kev, exploit, iocs, mitre_attack

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Related CVEs (5)

MEDIUMCVE-2026-24028EXP
Out-of-bounds read when parsing DNS packets via Lua
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MEDIUMCVE-2026-24029EXP
DNS over HTTPS ACL bypass
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MEDIUMCVE-2026-27853EXP
Out-of-bounds write when rewriting large DNS packets
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LOWCVE-2026-0396
HTML injection in the web dashboard
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MEDIUMCVE-2026-27854
Use after free when parsing EDNS options in Lua
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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
Mar 31, 2026
Discovered by ZDM
Mar 31, 2026
Updated: affectedVersions, severity
Mar 31, 2026
Patch Available
Mar 31, 2026

Version History

v2
Last enriched 4h ago
v2Tier C4h ago

Updated affected versions to include 1.9.11 and 2.0.2, changed severity to HIGH, and noted that no exploit exists.

affectedVersionsseverity
via VulDB
v15h ago

Initial creation