DSA-6369-1 pdns-recursor - security update
Multiple vulnerabiliites have been discovered in PDNS Recursor, a resolving name server which could result in denial of service, cache poisoning or information disclosure. https://security-tracker.debian.org/tracker/DSA-6369-1
CSIRTS triage
- What
- Multiple vulnerabilities in PDNS Recursor could lead to denial of service, cache poisoning, or information disclosure.
- Who is affected
- Deployments of PDNS Recursor are affected.
- Urgency
- Remediation is important due to the potential for service disruption and data exposure.
- Action
- Apply the latest security update for PDNS Recursor.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://lists.debian.org/debian-security-announce/2026/msg00280.html
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-336120.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
- Low exploitation riskCVE-2026-400120.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all scored CVEs.
- Low exploitation riskCVE-2026-420050.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all scored CVEs.
- Low exploitation riskCVE-2026-423870.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all scored CVEs.
- Low exploitation riskCVE-2026-423880.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all scored CVEs.
- Low exploitation riskCVE-2026-423900.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 12% of all scored CVEs.
- Low exploitation riskCVE-2026-526900.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-33612 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-40012 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42005 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42387 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42388 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-42390 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-52690 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownDSA-6367-1 dnsdist - security updatedebian
- unknownDSA-6368-1 pdns - security updatedebian
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