CVE-2026-12707— Cloudflare quiche 资源管理错误漏洞

Unbounded path event queue growth in quiche via peer-driven source connection ID rotation

Summary Cloudflare quiche was discovered to be vulnerable to memory resource exhaustion due to unbounded queuing of post-handshake client migration events. Impact quiche supports the connection migration features described in Section 9 of RFC 9000, which allows a single QUIC connection to survive changes in the network path. Although quiche implements the protections described in Section 9.3 of RFC 9000 to limit server state commitment, it was discovered that the collection of PathEvents, intended to be consumed by applications via the path_event_next() function, was not bounded. Once the QUIC handshake completed, a peer could exploit rapid source address migration in order to cause unbounded queuing of the PathEvent::ReusedSourceConnectionId type. Servers are vulnerable even if active connection migration is disabled. Mitigation: * Applications can call path_event_next() to drain the PathEvent collection, mitigating the attack. * Users are requested to upgrade to quiche 0.29.3 which is the earliest version that prevents excessive queueing of PathEvent::ReusedSourceConnectionId.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

不加限制或调节的资源分配

Cloudflare quiche 资源管理错误漏洞

Cloudflare quiche是美国Cloudflare公司开源的一个 IETF 指定的 QUIC 传输协议和 HTTP/3 的实现。 Cloudflare quiche 0.29.3之前版本存在资源管理错误漏洞，该漏洞源于握手后客户端迁移事件导致的未绑定队列，可能造成内存资源耗尽。

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