CVE-2026-33259— Concurrent modification of RPZ data can lead to denial of servce
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-33259
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Concurrent modification of RPZ data can lead to denial of servce
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
PowerDNS Recursor（pdns_recursor） 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PowerDNS Recursor（pdns_recursor）是荷兰PowerDNS公司的一款域名解析服务器。 PowerDNS Recursor存在资源管理错误漏洞，该漏洞源于同一RPZ的多次并发传输可能导致RPZ数据不一致、释放后重用和/或递归器崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-33259
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-33259
Please Login to view more intelligence information
Same Patch Batch · PowerDNS · 2026-04-22 · 22 CVEs total
| CVE-2026-33593 | 7.5 HIGH | Denial of service via crafted DNSCrypt query |
| CVE-2026-33608 | 7.4 HIGH | Incomplete domain name sanitization during |
| CVE-2026-33602 | 6.5 MEDIUM | Off-by-one access when processing crafted UDP responses |
| CVE-2026-33611 | 6.5 MEDIUM | Insufficient validation of HTTPS and SVCB records |
| CVE-2026-33261 | 5.9 MEDIUM | Null pointer accces in aggressive NSEC(3) cache |
| CVE-2026-33262 | 5.9 MEDIUM | Insufficient validation of cookie reply |
| CVE-2026-33610 | 5.9 MEDIUM | Possible file descriptor exhaustion in forward-dnsupdate |
| CVE-2026-33260 | 5.3 MEDIUM | Insufficient input validation of internal webserver |
| CVE-2026-33609 | 5.3 MEDIUM | LDAP DN injection |
| CVE-2026-33254 | 5.3 MEDIUM | Resource exhaustion via DoQ/DoH3 connections |
| CVE-2026-33595 | 5.3 MEDIUM | DoQ/DoH3 excessive memory allocation |
| CVE-2026-33594 | 5.3 MEDIUM | Outgoing DoH excessive memory allocation |
| CVE-2026-33256 | 5.3 MEDIUM | Unbounded memory allocation by internal web server |
| CVE-2026-33257 | 5.3 MEDIUM | Insufficient input validation of internal webserver |
| CVE-2026-33258 | 5.3 MEDIUM | Crafted zones can cause increased resource usage |
| CVE-2026-33598 | 4.8 MEDIUM | Out-of-bounds read in cache inspection via Lua |
| CVE-2026-33601 | 4.4 MEDIUM | Insufficient validation of zonemd record |
| CVE-2026-33600 | 4.4 MEDIUM | Null pointer dereference in RPZ transfer |
| CVE-2026-33597 | 3.7 LOW | PRSD detection denial of service |
| CVE-2026-33596 | 3.1 LOW | TCP backend stream ID overflow |
Showing top 20 of 22 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Recursor
V. Comments for CVE-2026-33259
No comments yet