CVE-2026-11352— QUIC zero-length UDP datagrams busy-loop
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-11352
Vulnerability Information
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Vulnerability Title
QUIC zero-length UDP datagrams busy-loop
Source: CVE Program / CVE List V5
Vulnerability Description
An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service against a curl or libcurl client. Because the helper function discards zero-length UDP datagrams before counting them toward the per-call packet budget, a connected QUIC peer can continuously stream empty datagrams to indefinitely stall the client.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
curl 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
curl是瑞典cURL团队开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl 存在资源管理错误漏洞，该漏洞源于curl的QUIC UDP接收函数问题，丢弃零长度UDP数据报时计数不当，可能导致恶意HTTP/3服务器触发远程拒绝服务攻击。
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-2026-11352
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Vendor Advisories for CVE-2026-11352 (2)
Other References for CVE-2026-11352 (1)
Same Patch Batch · curl · 2026-07-03 · 18 CVEs total
| CVE-2026-10536 | HTTP/2 stream-dependency tree UAF | |
| CVE-2026-8932 | incomplete mTLS config matching in conn reuse | |
| CVE-2026-8458 | wrong reuse for different services | |
| CVE-2026-8925 | SASL double-free | |
| CVE-2026-8286 | wrong STARTTLS connection reuse | |
| CVE-2026-8927 | env-set cross-proxy Digest auth state leak | |
| CVE-2026-8926 | password leak with netrc and user in URL | |
| CVE-2026-8924 | trailing dot domain super cookie | |
| CVE-2026-12064 | proto-default skips SSH verification | |
| CVE-2026-11586 | WS Auto-PONG memory exhaustion | |
| CVE-2026-9546 | sending old referer | |
| CVE-2026-9545 | exposing HTTP/3 early data | |
| CVE-2026-9080 | UAF after pause in socket callback | |
| CVE-2026-9547 | SSH improper host validation | |
| CVE-2026-9079 | stale proxy password leak | |
| CVE-2026-11564 | Native CA trust persist | |
| CVE-2026-11856 | cross-origin Digest auth state leak |
IV. Related Vulnerabilities
V. Comments for CVE-2026-11352
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