CVE-2026-29008

U-Boot through 2026.04-rc3 contains an integer underflow vulnerability in the tcprxstatemachine function net/tcp.c that allows a network-adjacent attacker to crash the bootloader by sending a malformed TCP SYN+ACK packet with a manipulated data offset field causing payloadlen to become negative...

EUVD-2006-1246

Malware in sbrugna...

CVE-2023-53121 tcp: tcp_make_synack() can be called from process context

In the Linux kernel, the following vulnerability has been resolved: tcp: tcpmakesynack can be called from process context tcprtxsynack now could be called in process context as explained in 0a375c822497 "tcp: tcprtxsynack can be called from process context". tcprtxsynack might call tcpmakesynack,...

UBUNTU-CVE-2025-23145

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix NULL pointer in canacceptnewsubflow When testing valkey benchmark tool with MPTCP, the kernel panics in 'mptcpcanacceptnewsubflow' because subflowreq-msk is NULL. Call trace: mptcpcanacceptnewsubflow...

CVE-2025-23145

Summary (CVE-2025-23145) : Linux kernel MPTCP component fix for a NULL pointer dereference in can_accept_new_subflow when subflow_req->msk is NULL. The issue could occur when a SYN-ACK is received twice in quick succession and the ownership of subflow_req->msk is transferred to the first su...

Anatomy of a SYN-ACK Attack

...

PT-2025-18399

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A vulnerability has been resolved in the Linux kernel related to the MPTCP protocol. The issue occurs when the kernel panics in 'mptcp can accept new subflow' due to a NULL pointer...

CVE-2024-50154 tcp/dccp: Don't use timer_pending() in reqsk_queue_unlink().

In the Linux kernel, the following vulnerability has been resolved: tcp/dccp: Don't use timerpending in reqskqueueunlink. Martin KaFai Lau reported use-after-free 0 in reqsktimerhandler. """ We are seeing a use-after-free from a bpf prog attached to tracetcpretransmitsynack. The program passes th...

CVE-2024-50154

The CVE-2024-50154 vulnerability is in the Linux kernel. Root cause: a use-after-free can occur in reqsk_timer_handler() when a race around timer_pending() in reqsk_queue_unlink() allows a timer to fire after the socket is closed. The fix prevents del_timer_sync() from being missed by removing ti...

PT-2024-33987

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 6.6.61 Description: A use-after-free vulnerability was reported in the Linux kernel's TCP timer handling. The issue occurs when the req-sk is closed before the timer expiration, which is 63 seconds by default...

CVE-2020-7451

In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosin...

CVE-2020-7451

CVE-2020-7451 affects FreeBSD: TCP servers sending or retransmitting IPv6 SYN-ACK (and challenge ACK) segments may disclose one byte of kernel memory due to Traffic Class not initialized. Affected: FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740...

CVE-2020-7451

In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosin...

CVE-2020-7451: Use of Uninitialized Resource

In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosin...

PT-2020-19587

Name of the Vulnerable Software and Affected Versions FreeBSD versions 12.1-STABLE before r358739 FreeBSD versions 12.1-RELEASE before 12.1-RELEASE-p3 FreeBSD versions 11.3-STABLE before r358740 FreeBSD versions 11.3-RELEASE before 11.3-RELEASE-p7 Description A TCP SYN-ACK or challenge TCP-ACK...

New Linux Bug Lets Attackers Hijack Encrypted VPN Connections

A team of cybersecurity researchers has disclosed a new severe vulnerability affecting most Linux and Unix-like operating systems, including FreeBSD, OpenBSD, macOS, iOS, and Android, that could allow remote 'network adjacent attackers' to spy on and tamper with encrypted VPN connections. The...

Design/Logic Flaw

D-Link DCS-825L devices with firmware 1.08 do not employ a suitable mechanism to prevent denial-of-service DoS attacks. An attacker can harm the device availability i.e., live-online video/audio streaming by using the hping3 tool to perform an IPv4 flood attack. Verified attacks includes SYN...

CVE-2018-18442

D-Link DCS-825L devices with firmware 1.08 do not employ a suitable mechanism to prevent denial-of-service DoS attacks. An attacker can harm the device availability i.e., live-online video/audio streaming by using the hping3 tool to perform an IPv4 flood attack. Verified attacks includes SYN...

CVE-2018-18442

CVE-2018-18442 affects the D-Link DCS-825L (firmware 1.08). The vulnerability is a DoS due to insufficient input validation in the firmware, enabling a remote attacker to disrupt device availability (e.g., live video/audio streaming) via crafted or flood-like network traffic (syn/udp/icmp, includ...

Zyxel Prestige 642R Malformed Packet Denial of Service Vulnerability

No description provided by source. source: http://www.securityfocus.com/bid/5034/info ZyXEL 642R routers have difficulties handling certain types of malformed packets. In particular, it is possible to deny services by sending a vulnerable router a SYN-ACK packet. To a lesser degree, the router al...