CVE-2026-88840

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

CVE-2026-88840 Busybox: busybox: tls ssl_server reads one byte out of bounds when parsing truncated clienthello

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

CVE-2026-88840

The BusyBox TLS implementation contains an out-of-bounds read vulnerability in the get_client_hello() function. The issue occurs when the software attempts to parse a truncated ClientHello message , causing the system to read past the end of the input buffer. This vulnerability is specifically as...

EUVD-2026-85513

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

CVE-2026-88840

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

CVE-2026-88840 Busybox: busybox: tls ssl_server reads one byte out of bounds when parsing truncated clienthello

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

CVE-2026-88840

BusyBox TLS getclienthello reads past the end of the input buffer when parsing a truncated ClientHello message. Mitigation Do not use BusyBox sslserver in production deployments. Upstream should add a bounds check to verify len 0 before reading the compression-methods length byte...

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-2026:4042-1)

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...

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...

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 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...

GHSA-C4C3-7FPV-J4Q5 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...

GHSA-FCCG-MWVH-QQG4 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...