CVE-2024-47535 Denial of Service attack on windows app using Netty
An attacker can cause a denial of service in Windows applications using Netty by creating a large file that triggers an unsafe read, crashing the application.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-47535?
CVE-2024-47535 is a medium-severity denial of service vulnerability in Netty Netty, published on 12 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. An unsafe reading of environment file could potentially cause a denial of service in Netty. When loaded on an Windows application, Netty attempts to load a file that does not exist. If an attacker creates such a large file, the Netty application crashes. This vulnerability is fixed in 4.1.115.
Weakness: CWE-400
Which versions are affected by CVE-2024-47535?
2 open source packages ship an affected version, including io.netty:netty-common. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
io.netty:netty-common Maven | All versions | 4.1.115.Final |
io.netty:netty-common Maven | All versions | 4.1.115.Final |
Linux distribution packages (15)
netty-tcnative SUSE:Linux Enterprise Module for Development Tools 15 SP5 | All versions | 2.0.69-150200.3.22.1 |
netty-tcnative SUSE:Linux Enterprise Module for Development Tools 15 SP6 | All versions | 2.0.69-150200.3.22.1 |
jctools SUSE:Linux Enterprise Module for Package Hub 15 SP5 | All versions | 4.0.5-150200.3.9.1 |
netty SUSE:Linux Enterprise Module for Package Hub 15 SP5 | All versions | 4.1.115-150200.4.26.1 |
jctools SUSE:Linux Enterprise Module for Package Hub 15 SP6 | All versions | 4.0.5-150200.3.9.1 |
netty SUSE:Linux Enterprise Module for Package Hub 15 SP6 | All versions | 4.1.115-150200.4.26.1 |
netty SUSE:Manager Server Module 4.3 | All versions | 4.1.44.Final-150400.3.6.3 |
susemanager-sync-data SUSE:Manager Server Module 4.3 | All versions | 4.3.23-150400.3.41.3 |
jctools openSUSE:Leap 15.5 | All versions | 4.0.5-150200.3.9.1 |
netty openSUSE:Leap 15.5 | All versions | 4.1.115-150200.4.26.1 |
netty-tcnative openSUSE:Leap 15.5 | All versions | 2.0.69-150200.3.22.1 |
jctools openSUSE:Leap 15.6 | All versions | 4.0.5-150200.3.9.1 |
netty openSUSE:Leap 15.6 | All versions | 4.1.115-150200.4.26.1 |
netty-tcnative openSUSE:Leap 15.6 | All versions | 2.0.69-150200.3.22.1 |
netty openSUSE:Tumbleweed | All versions | 4.1.115-1.1 |
Products include Netty Netty.
How do I fix CVE-2024-47535?
Upgrade io.netty:netty-common to 4.1.115.Final or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-47535 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-47535 exists.
Other vulnerabilities in Netty Netty
- CVE-2026-75595 Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext
- CVE-2026-75596 Netty: Fragmented ClientHello records trigger quadratic pre-handshake reassembly in default SNI parsing
- CVE-2026-59901 Netty Bzip2Decoder: Infinite Loop in RLE State Machine Leads to Event-Loop Thread Hang
- CVE-2026-55851 Netty codec-haproxy: Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion
- CVE-2026-56745 Netty SpdyHttpDecoder: ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion
Sources
Also known as CLEANSTART-2026-BY06273, CLEANSTART-2026-DV78787, CLEANSTART-2026-HT34208, CLEANSTART-2026-UI81727, CLEANSTART-2026-UT87465, ECHO-fbb6-be14-cc2d and 19 more.