CVE-2026-42389 Affecting pdns-recursor package, versions <5.4.3-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published26 Jun 2026
- disclosed25 Jun 2026
Introduced: 25 Jun 2026
CVE-2026-42389 (opens in a new tab)How to fix?
Upgrade Debian:unstable pdns-recursor to version 5.4.3-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream pdns-recursor package and not the pdns-recursor package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.