CVE-2026-79896 Fortra BoKS Manager boks_portmux TLS ClientHello out-of-bounds read vulnerability

Fortra BoKS Manager contains an out-of-bounds read vulnerability in the custom TLS ClientHello parser used by boksportmux. A remote unauthenticated attacker can submit a malformed ClientHello and terminate boksportmux. Although the daemon is normally restarted automatically, repeated requests can...

CVE-2026-79896 Fortra BoKS Manager boks_portmux TLS ClientHello out-of-bounds read vulnerability

Fortra BoKS Manager contains an out-of-bounds read vulnerability in the custom TLS ClientHello parser used by boksportmux. A remote unauthenticated attacker can submit a malformed ClientHello and terminate boksportmux. Although the daemon is normally restarted automatically, repeated requests can...

EUVD-2026-90881

Fortra BoKS Manager contains an out-of-bounds read vulnerability in the custom TLS ClientHello parser used by boksportmux. A remote unauthenticated attacker can submit a malformed ClientHello and terminate boksportmux. Although the daemon is normally restarted automatically, repeated requests can...

CVE-2026-79896

Fortra BoKS Manager is vulnerable to an out-of-bounds read in the custom TLS ClientHello parser utilized by boks_portmux . A remote unauthenticated attacker can exploit this by submitting a malformed ClientHello to terminate the boks_portmux daemon. While the daemon typically restarts automatical...

io.netty/netty-handler: Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext

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...

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...

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...

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...

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...

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...

JLSEC-2026-1257 Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function...

Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function mgtlsserverrecvhello, which uses an attacker-controlled sessionidlen byte from a TLS ClientHello as a buffer index without validating it against the length of received data. A remote, unauthenticated...

PT-2026-80499

Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function mg tls server recv hello, which uses an attacker-controlled session id len byte from a TLS ClientHello as a buffer index without validating it against the length of received data. A remote,...

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...

PT-2026-80721

This update for openssl-1 1 fixes the following issues: - HollowByte: DoS vector against OpenSSL TLS ClientHello via remote, attacker-controlled memory allocations bsc1271712...

CVE-2026-44452 h2o is vulnerable to heap overrun

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 8dc37cb, when h2o receives a ClientHello message over TLS or QUIC and it contains a zero-length SNI extension, the h2o server runs over the zero-length hostname while trying to copy the hostname, assuming that it ...

CVE-2026-11404: Out-of-bounds Read

Cesanta Mongoose before 7.22 contains an out-of-bounds read in the built-in TLS server function mgtlsserverrecvhello, which uses an attacker-controlled sessionidlen byte from a TLS ClientHello as a buffer index without validating it against the length of received data. A remote, unauthenticated...