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CVE-2026-93575— Netty MQTT解码器资源耗尽漏洞

一分钟漏洞结论

影响对象
Red Hat Red Hat AMQ Broker 7
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Summary Netty's fix for CVE-2026-44248 is incomplete. The decoder checks if the MQTT packet's exceeds , but fails to validate the against the . An attacker can bypass the size limit by sending a small but an enormous . This forces Netty to buffer and parse mil

CVSS 7.5 · High
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一、 漏洞 CVE-2026-93575 基础信息

漏洞信息
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Vulnerability Title
Io.netty/netty-codec-mqtt: netty: resource exhaustion in mqttdecoder
来源: CVE Program / CVE List V5
Vulnerability Description
### Summary Netty's fix for CVE-2026-44248 is incomplete. The decoder checks if the MQTT packet's `Remaining Length` exceeds `maxBytesInMessage`, but fails to validate the `Properties Length` against the `Remaining Length`. An attacker can bypass the size limit by sending a small `Remaining Length` but an enormous `Properties Length`. This forces Netty to buffer and parse millions of properties, allowing an unauthenticated remote attacker to trigger excessive memory and CPU consumption, leading to OutOfMemoryError. ### Details In `io.netty.handler.codec.mqtt.MqttDecoder`, the `decodeProperties()` helper method reads `totalPropertiesLength` and attempts to parse that many bytes. If the buffer lacks the full length, a `Signal` is thrown. The `catch` block inside `decode()` only enforces `maxBytesInMessage` against `bytesRemainingBeforeVariableHeader` (the packet's `Remaining Length`). By sending a `CONNECT` packet with a small `Remaining Length` but a huge `Properties Length`, the size check passes. `ReplayingDecoder` then buffers data from the network until the huge `Properties Length` is reached, parsing millions of `UserProperty` objects and exhausting CPU and memory. #
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
OWASP 2017年十大分类A9-使用含有已知漏洞的组件
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
Red Hat Red Hat AMQ Broker 7 - cpe:/a:redhat:amq_broker:7
Red Hat Red Hat build of Apache Camel for Spring Boot 4 - cpe:/a:redhat:camel_spring_boot:4
Red Hat Red Hat Fuse 7 - cpe:/a:redhat:jboss_fuse:7
Red Hat Red Hat JBoss Enterprise Application Platform 7 - cpe:/a:redhat:jboss_enterprise_application_platform:7
Red Hat Red Hat JBoss Enterprise Application Platform 7 - cpe:/a:redhat:jboss_enterprise_application_platform:7
Red Hat Red Hat JBoss Enterprise Application Platform 7 - cpe:/a:redhat:jboss_enterprise_application_platform:7
Red Hat Red Hat JBoss Enterprise Application Platform 7 - cpe:/a:redhat:jboss_enterprise_application_platform:7
Red Hat Red Hat Single Sign-On 7 - cpe:/a:redhat:red_hat_single_sign_on:7

二、漏洞 CVE-2026-93575 的公开POC

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三、漏洞 CVE-2026-93575 的情报信息

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CVE-2026-93575 厂商安全公告 (2)

同批安全公告 · Red Hat · 2026-09-18 · 共 33 条

CVE-2026-93569 8.2 HIGH Netty http2 代理主机头覆盖漏洞
CVE-2026-93564 7.5 HIGH Netty haproxy模块嵌套TLV引用计数泄漏
CVE-2026-89059 7.5 HIGH Resteasy iioimageprovider 图片解压炸弹拒绝服务漏洞
CVE-2026-93494 7.5 HIGH Netty Stomp子帧解码器字节缓冲区泄漏漏洞
CVE-2026-87743 7.5 HIGH Quarkus vertx-http 路径规范化授权绕过漏洞
CVE-2026-93572 7.5 HIGH Netty redisarrayaggregator 预分配限制漏洞
CVE-2026-93563 7.5 HIGH Netty-codec-smtp SMTP解码器内存耗尽DoS
CVE-2026-93488 7.5 HIGH Netty 远程拒绝服务漏洞
CVE-2026-93491 7.5 HIGH Netty HTTPServerCodec 拒绝服务漏洞
CVE-2026-93560 7.5 HIGH Netty STOMP编解码器无限循环拒绝服务漏洞
CVE-2026-93558 7.5 HIGH Netty WebSocket扩展处理器未界队列拒绝服务
CVE-2026-93565 7.5 HIGH Netty RTSP解码器方法令牌走私漏洞
CVE-2026-91149 7.5 HIGH Cockpit: cockpit: denial of service via unbounded connection thread spawning
CVE-2026-93567 7.5 HIGH Netty HTTP2 authority 连接转换缺陷
CVE-2026-93576 7.5 HIGH Netty SMTP命令名CRLF校验不完整漏洞
CVE-2026-93568 7.5 HIGH Netty HTTP/2与HTTP/3 CONNECT请求降级漏洞
CVE-2026-89058 7.4 HIGH Resteasy CORSFilter 任意源凭据反射漏洞
CVE-2026-81627 6.7 MEDIUM Qemu-kvm 远程代码执行漏洞
CVE-2026-93566 6.5 MEDIUM Netty Http 请求走私漏洞
CVE-2026-93579 6.5 MEDIUM Io.netty/netty-codec-http2: netty: http/2 header field values are not validated by default

显示前 20 条，共 33 条。 查看全部 → →

IV. Related Vulnerabilities

Same product: Red Hat AMQ Broker 7
Same vendor: Red Hat
Same weakness: CWE-1035

V. Comments for CVE-2026-93575

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