CVE-2026-88840: Out-of-bounds Read

BusyBox TLS getclienthello reads past the end of the input buffer when parsing a truncated ClientHello message...

SUSE SLES15 Security Update : openssl-1_1-livepatches (SUSE-SU-2026:4036-1)

The remote SUSE Linux SLES15 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2026:4036-1 advisory. - CVE-2026-63072: heap buffer overflow in CMS key unwrapping bsc1275133, bsc1274788. - HollowByte: DoS vector against OpenSSL TLS ClientHello via remot...

SUSE SLES15 Security Update : openssl-1_1-livepatches (SUSE-SU-2026:4042-1)

The remote SUSE Linux SLES15 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2026:4042-1 advisory. - CVE-2026-63072: heap buffer overflow in CMS key unwrapping bsc1275133, bsc1274788. - HollowByte: DoS vector against OpenSSL TLS ClientHello via remot...

CVE-2026-75595

A flaw was found in Netty, an asynchronous, event-driven network application framework. An unauthenticated remote attacker can exploit fragmented Transport Layer Security TLS ClientHello messages to bypass the Server Name Indication SNI routing mechanism. This forces a fallback to a less secure...

Astra Linux – Vulnerability in mbedtls

A issue was discovered in Mbed TLS 3.5.1. There is a persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions...

Astra Linux – Vulnerability in mbedtls

A vulnerability was discovered in Mbed TLS before versions 2.28.1 and 3.x, prior to 3.2.0. In some configurations, an unauthenticated attacker can send an invalid ClientHello message to a DTLS server, causing a heap-based buffer overflow of up to 255 bytes. This can lead to a server crash or,...

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...

Denial Of Service (DoS)

Netty is vulnerable to Denial of Service DoS. The vulnerability is due to inefficient quadratic CPU processing when aggregating large TLS ClientHello messages split across many small records, which allows an unauthenticated remote attacker to consume excessive CPU resources and degrade TLS handli...

Improper Authorization

Netty is vulnerable to Improper Authentication. The vulnerability is due to incorrect offset validation when processing fragmented TLS ClientHello handshake headers, which allows an unauthenticated remote attacker to bypass SNI-specific mutual TLS authentication when no additional certificate...

Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext

Summary A fragmented TLS ClientHello whose handshake header spans multiple records makes Netty silently fall back to the default SslContext; where per-SNI selection is the sole mTLS gate, an unauthenticated attacker can bypass the route's mTLS requirement. Details In...

EUVD-2026-63092

Netty: Fragmented ClientHello records trigger quadratic pre-handshake reassembly in default SNI parsing...

Netty: Fragmented ClientHello records trigger quadratic pre-handshake reassembly in default SNI parsing

Summary Netty's default SNI entrypoint reparses and recopies previously received ClientHello fragments on every additional TLS handshake record. A remote peer can send a small first record that advertises a large ClientHello length and then drip the body in many tiny records, causing superlinear...

Security update for openssl-1_1-livepatches

This update for openssl-11-livepatches fixes the following issues: CVE-2026-63072: heap buffer overflow in CMS key unwrapping bsc1275133, bsc1274788. HollowByte: DoS vector against OpenSSL TLS ClientHello via remote, attacker-controlled memory allocations bsc1271712, bsc1271713. Patch Instruction...

SUSE-SU-2026:4042-1 Security update for openssl-1_1-livepatches

This update for openssl-11-livepatches fixes the following issues: - CVE-2026-63072: heap buffer overflow in CMS key unwrapping bsc1275133, bsc1274788. - HollowByte: DoS vector against OpenSSL TLS ClientHello via remote, attacker-controlled memory allocations bsc1271712, bsc1271713...

SUSE-SU-2026:4036-1 Security update for openssl-1_1-livepatches

This update for openssl-11-livepatches fixes the following issues: - CVE-2026-63072: heap buffer overflow in CMS key unwrapping bsc1275133, bsc1274788. - HollowByte: DoS vector against OpenSSL TLS ClientHello via remote, attacker-controlled memory allocations bsc1271712, bsc1271713...

Security update for openssl-1_1-livepatches

This update for openssl-11-livepatches fixes the following issues: CVE-2026-63072: heap buffer overflow in CMS key unwrapping bsc1275133, bsc1274788. HollowByte: DoS vector against OpenSSL TLS ClientHello via remote, attacker-controlled memory allocations bsc1271712, bsc1271713. Patch Instruction...

erlang: Erlang/OTP: Denial of Service in TLS 1.3 session ticket handling

A flaw was found in Erlang/OTP's SSL Secure Sockets Layer application. An unauthenticated remote attacker can send a specially crafted ClientHello message to a TLS 1.3 server with session tickets enabled. This can permanently disrupt the server's ability to handle session tickets, leading to a...

SUSE-SU-2026:23585-1 Security update for openssl-3-x86_64-v3-livepatches

This update for openssl-3-x8664-v3-livepatches fixes the following issues: - HollowByte: DoS vector against OpenSSL TLS ClientHello via remote, attacker-controlled memory allocations bsc1271713, bsc1271712. - CVE-2026-14457: RPK server signature algorithm selection can dereference a missing...

SUSE CVE-2026-75596

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, the default io.netty.handler.ssl.SniHandler constructors use the pre-handshake ClientHello aggregation path in handler/src/main/java/io/netty/handler/ssl/SslClientHelloHandler.java at...

Linux Distros Unpatched Vulnerability : CVE-2026-75596

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, the default io.netty.handler.ssl.SniHandler...