CVE-2026-11941— Cloudflare Quiche 资源管理错误漏洞

Use-after-free in connection ID iterator and FFI functions

Cloudflare Quiche was affected by 2 use-after-free vulnerabilities in the connection ID iterator FFI functions. The “quiche_connection_id_iter_next” and “quiche_conn_retired_scid_next” functions would return a pointer to a “ConnectionId” to the applications via function arguments, but the owned “ConnectionId” would be dropped at the end of those functions' scope. Only applications using those FFI functions are affected. The FFI API is disabled by default by a build-time feature flag. Impact If unpatched, an application calling the affected FFI functions will dereference freed memory. The most likely outcome is undefined behavior leading to a process crash (denial of service). Depending on allocator state, the read may also return adjacent heap contents, resulting in limited information disclosure or incorrect connection identifier handling. Mitigation Users are requested to upgrade to quiche 0.29.2 which is the earliest version containing the fix for this issue.

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

释放后使用

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 0.20.0版本至0.29.1版本存在资源管理错误漏洞，该漏洞源于连接ID迭代器FFI函数中存在2个释放后重用漏洞，可能导致未修补的应用程序引用已释放的内存，从而导致进程崩溃（拒绝服务）。

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