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CVE-2026-27854

An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:75edb9069366f77b5c7e75954932d55b1dd8d050f55de13d3f402edc1dd51021
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"Use After Free","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dd83ca68567a4f3da04c1be30e8760065bd482409f8b4d58544379857c6b9d9c · sha256:7ef9cf2f8901f0c5… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-416","description":"CWE-416 Use After Free","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dd83ca68567a4f3da04c1be30e8760065bd482409f8b4d58544379857c6b9d9c · sha256:7ef9cf2f8901f0c5… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"collectionURL":"https://repo.powerdns.com/","defaultStatus":"unaffected","modules":["EDNS options cache"],"packageName":"dnsdist","product":"DNSdist","programFiles":["dnsdist.hh"],"repo":"https://github.com/PowerDNS/pdns","vendor":"PowerDNS","versions":[{"lessThan":"1.9.12","status":"affected","version":"1.9.0","versionType":"semver"},{"lessThan":"2.0.3","status":"affected","version":"2.0.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:dd83ca68567a4f3da04c1be30e8760065bd482409f8b4d58544379857c6b9d9c · sha256:7ef9cf2f8901f0c5… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":4.8,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:dd83ca68567a4f3da04c1be30e8760065bd482409f8b4d58544379857c6b9d9c · sha256:7ef9cf2f8901f0c5… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"Use After Free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dd83ca68567a4f3da04c1be30e8760065bd482409f8b4d58544379857c6b9d9c · sha256:7ef9cf2f8901f0c5… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-416","description":"CWE-416 Use After Free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:dd83ca68567a4f3da04c1be30e8760065bd482409f8b4d58544379857c6b9d9c · sha256:7ef9cf2f8901f0c5… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:dd83ca68567a4f3da04c1be30e8760065bd482409f8b4d58544379857c6b9d9c · sha256:7ef9cf2f8901f0c5… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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