CVE-2026-33261
pdns-recursor: A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.
CVE-2026-33261 is fixed in pdns-recursor on 1 platform, first by DEBIAN-CVE-2026-33261, released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.9
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0024
15th percentile
A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| pdns-recursor · Debian 13.5 (trixie) | 5.2.9-0+deb13u1 | DEBIAN-CVE-2026-33261 | May 15, 2026 |
| pdns-recursor · Debian 14 | 5.4.1-1 | DEBIAN-CVE-2026-33261 | May 15, 2026 |
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