This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-93575 →

DEBIAN-CVE-2026-93575

A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT...

Original description

The description as published by the source.

A flaw was found in Netty's MqttDecoder. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted MQTT CONNECT packet. The decoder fails to properly validate the 'Properties Length' against the 'Remaining Length', allowing an attacker to bypass size limits. This leads to excessive memory and CPU consumption, resulting in a denial of service (DoS) due to an OutOfMemoryError.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 netty

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 netty

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 netty

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

References

advisory security-tracker.debian.org