CVE-2026-33259 Concurrent modification of RPZ data can lead to denial of servce

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...

CVE-2026-33259

CVE-2026-33259 affects PowerDNS Recursor RPZ handling. The issue arises when there are many concurrent transfers of the same RPZ, which can lead to inconsistent RPZ data, use-after-free, or a crash of the recursor. The root cause is described as concurrent transfers of the same RPZ zone occurring...

CVE-2026-33259

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...

PT-2026-34323

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...