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IBM Security Bulletins
IBM Security Bulletins
•added 2026/10/06 5:55 p.m.•12 views

Security Bulletin:Netty TLS ClientHello Length Vulnerability: Unbounded Memory Allocation

Summary Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, SslClientHelloHandler.decode reads the 24-bit TLS handshake length and, when the ClientHello does not fit in the first record, eagerly allocates...

7.5CVSS7.3AI score0.01576EPSS
SaveExploits0Affected Software1
RedHat Linux
RedHat Linux
•added 2026/10/06 11:45 a.m.•10 views

netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake

A flaw was found in Netty, a network application framework. A remote attacker can exploit this vulnerability by sending a crafted TLS Transport Layer Security ClientHello message. This can lead to an eager allocation of a large memory buffer, causing a Denial of Service DoS due to excessive memor...

7.5CVSS7.1AI score0.01576EPSS
SaveExploits0References7
RedHat Linux
RedHat Linux
•added 2026/10/06 11:45 a.m.•12 views

netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake

A flaw was found in Netty, a network application framework. A remote attacker can exploit this vulnerability by sending a crafted TLS Transport Layer Security ClientHello message. This can lead to an eager allocation of a large memory buffer, causing a Denial of Service DoS due to excessive memor...

7.5CVSS7.1AI score0.01576EPSS
SaveExploits0References7
RedHat Linux
RedHat Linux
•added 2026/10/06 11:40 a.m.•11 views

netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake

A flaw was found in Netty, a network application framework. A remote attacker can exploit this vulnerability by sending a crafted TLS Transport Layer Security ClientHello message. This can lead to an eager allocation of a large memory buffer, causing a Denial of Service DoS due to excessive memor...

7.5CVSS7.1AI score0.01576EPSS
SaveExploits0References7
RedHat Linux
RedHat Linux
•added 2026/10/05 6:18 p.m.•14 views

netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake

A flaw was found in Netty, a network application framework. A remote attacker can exploit this vulnerability by sending a crafted TLS Transport Layer Security ClientHello message. This can lead to an eager allocation of a large memory buffer, causing a Denial of Service DoS due to excessive memor...

7.5CVSS7.1AI score0.01576EPSS
SaveExploits0References7
BDU FSTEC
BDU FSTEC
•added 2026/09/28 12:00 a.m.•18 views

The vulnerability of the `SslClientHelloHandler.decode()` function in the framework for developing network applications, servers, and clients using the Netty protocol allows a hacker to induce a service failure.

The vulnerability of the SslClientHelloHandler.decode function in the framework for developing network applications, servers, and clients using the Netty protocol is related to unlimited resource distribution. Exploiting this vulnerability can allow a malicious actor to cause service failures...

7.8CVSS6.5AI score0.01576EPSS
SaveExploits0References26Affected Software14
RedHat Linux
RedHat Linux
•added 2026/09/21 2:38 p.m.•16 views

netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake

A flaw was found in Netty, a network application framework. A remote attacker can exploit this vulnerability by sending a crafted TLS Transport Layer Security ClientHello message. This can lead to an eager allocation of a large memory buffer, causing a Denial of Service DoS due to excessive memor...

7.5CVSS7.1AI score0.01576EPSS
SaveExploits0References7
RedHat Linux
RedHat Linux
•added 2026/08/11 4:41 p.m.•14 views

netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake

A flaw was found in Netty, a network application framework. A remote attacker can exploit this vulnerability by sending a crafted TLS Transport Layer Security ClientHello message. This can lead to an eager allocation of a large memory buffer, causing a Denial of Service DoS due to excessive memor...

7.5CVSS7.1AI score0.01576EPSS
SaveExploits0References7
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