CVE-2026-33259

Concurrent modification of RPZ data can lead to denial of servce

Medium · published April 22, 2026

CVSS v3.1
5.0
EPSS
0%
Percentile
18.1
In the wild
Unconfirmed
What it is

Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.

The record
Technical detail
CVSS v3.1
5.0 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
CVSS v4.0
Not supplied
EPSS
0.00269 · 18.1th percentile
Published
2026-04-22T09:38Z
EPSS history
Timeline
  • 22 APR 09:38Z
    Concurrent modification of RPZ data can lead to denial of servce
    cvelistv5