CVE-2026-24030— Unbounded memory allocation for DoQ and DoH3
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I. Basic Information for CVE-2026-24030
Vulnerability Information
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Vulnerability Title
Unbounded memory allocation for DoQ and DoH3
Source: NVD (National Vulnerability Database)
Vulnerability Description
An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
PowerDNS DNSdist 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PowerDNS DNSdist是PowerDNS公司的一个提供DNS流量负载均衡与安全防护能力的代理软件。 PowerDNS DNSdist存在安全漏洞，该漏洞源于处理DNS over QUIC或DNS over HTTP/3有效载荷时内存分配过多，可能导致拒绝服务。
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-2026-24030
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Same Patch Batch · PowerDNS · 2026-03-31 · 7 CVEs total
| CVE-2026-24029 | 6.5 MEDIUM | DNS over HTTPS ACL bypass |
| CVE-2026-27853 | 5.9 MEDIUM | Out-of-bounds write when rewriting large DNS packets |
| CVE-2026-24028 | 5.3 MEDIUM | Out-of-bounds read when parsing DNS packets via Lua |
| CVE-2026-27854 | 4.8 MEDIUM | Use after free when parsing EDNS options in Lua |
| CVE-2026-0397 | 3.1 LOW | Information disclosure via CORS misconfiguration |
| CVE-2026-0396 | 3.1 LOW | HTML injection in the web dashboard |
IV. Related Vulnerabilities
V. Comments for CVE-2026-24030
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