fi6s

fi6s: Fast IPv6 scanner fi6s is an IPv6 port scanner designed to be fast, aimed at Internet scanning and discovery. This is achieved by sending and processing raw packets asynchronously. The design and goal is pretty similar to Masscan, though it is not as full-featured. Please take note of the...

CVE-2026-98432: A Remote Use-After-Free in the Linux Kernel's TCP Stack

Learn about CVE-2026-98432, a critical remote use-after-free flaw in the Linux kernel TCP stack, its root exploit risks, affected versions, and mitigation steps...

Exploit for CVE-2026-98432

CVE-2026-98432 — Linux IPv4/TCP ireqopt use-after-free PoC...

Exploit for CVE-2026-98432

CVE-2026-98432 – Linux IPv4 TCP U...

Vulnerabilities fixed in Linux kernel

Linux has patched vulnerabilities in the IPv4 TCP stack and the IPv4 networking subsystem of the Linux kernel. The first vulnerability involves a race condition in the IPv4 TCP stack that leads to a use-after-free of socket options during concurrent TCP SYN retransmissions or request socket...

Exploit for CVE-2026-98432

CVE-2026-98432 research toolkit A small, tested laboratory to...

CVE-2026-19735

The Zephyr TCP stack contains a vulnerability where the RFC 6528 initial-sequence-number (ISN) implementation may use predictable values. If the sys_csrand_get() call fails during early boot (e.g., due to -ENODEV or -EIO from the entropy driver), the system fails to catch the error and leaves the...

CVE-2026-19735 Predictable TCP initial sequence numbers when the RFC 6528 secret key generation fails silently in the Zephyr TCP stack

The RFC 6528 initial-sequence-number implementation in subsys/net/ip/tcp.c derived every TCP ISN from SHA-256uniquekey || four-tuple plus a uptime-derived offset, where uniquekey is a 128-bit secret filled once by syscsrandget. The return value of that call was discarded and the once guard was...

CVE-2026-19735 Predictable TCP initial sequence numbers when the RFC 6528 secret key generation fails silently in the Zephyr TCP stack

The RFC 6528 initial-sequence-number implementation in subsys/net/ip/tcp.c derived every TCP ISN from SHA-256uniquekey || four-tuple plus a uptime-derived offset, where uniquekey is a 128-bit secret filled once by syscsrandget. The return value of that call was discarded and the once guard was...

CVE-2026-19735 Predictable TCP initial sequence numbers when the RFC 6528 secret key generation fails silently in the Zephyr TCP stack

The RFC 6528 initial-sequence-number implementation in subsys/net/ip/tcp.c derived every TCP ISN from SHA-256uniquekey || four-tuple plus a uptime-derived offset, where uniquekey is a 128-bit secret filled once by syscsrandget. The return value of that call was discarded and the once guard was...

pbscan

RESUMEN polarbearscan es un intento de realizar un escaneo de puertos y captura de banners más rápido y eficiente. Combina dos ideas diferentes que, con suerte, lo harán merecedor de su atención y tiempo. La primera de estas ideas es utilizar escaneo SYN sin estado usando cookies criptográficamen...

CVE-2026-49422

The RACK setsockopt2 handler drops the connection lock in order to copy option data from userspace, then reacquires the lock. After reacquiring, it verifies that the TCP stack had not been switched away, but did not reload its pointer to the stack's per-connection control block. If userspace...

EUVD-2026-62244

The RACK setsockopt2 handler drops the connection lock in order to copy option data from userspace, then reacquires the lock. After reacquiring, it verifies that the TCP stack had not been switched away, but did not reload its pointer to the stack's per-connection control block. If userspace...

Linux Distros Unpatched Vulnerability : CVE-2026-74268

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - tcp: clear sockops cb flags before force-closing a child socket A child socket inherits the listener's bpfsockopscbflags via skclonelock. If its setup fails in...

CVE-2026-64024

A flaw was found in the Linux kernel's Transmission Control Protocol TCP networking stack. This vulnerability arises from a stale per-CPU variable that can retain a previously used Initial Sequence Number ISN when certain packets are dropped. A remote attacker could exploit this by sending...

CVE-2026-53183

In the Linux kernel, the following vulnerability has been resolved: mptcp: allow subflow rcv wnd to shrink In MPTCP connection, the window field in the TCP header refers to the MPTCP-level rcvnxt and it's right edge should not move backward. Such constraint is enforced at DSS option generation...

CVE-2026-10634

Zephyr's native TCP stack iterates the global connection list in nettcpforeach subsys/net/ip/tcp.c using the SYSSLISTFOREACHCONTAINERSAFE macro, which caches a pointer to the next list node. Prior to this fix the function released tcplock while invoking the per-connection callback and re-acquired...

CVE-2026-10634

Zephyr's native TCP stack iterates the global connection list in nettcpforeach subsys/net/ip/tcp.c using the SYSSLISTFOREACHCONTAINERSAFE macro, which caches a pointer to the next list node. Prior to this fix the function released tcplock while invoking the per-connection callback and re-acquired...

CVE-2026-10634: Use After Free

Zephyr's native TCP stack iterates the global connection list in nettcpforeach subsys/net/ip/tcp.c using the SYSSLISTFOREACHCONTAINERSAFE macro, which caches a pointer to the next list node. Prior to this fix the function released tcplock while invoking the per-connection callback and re-acquired...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003096)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003096 advisory. The TCP stack in the Linux kernel 3.x does not properly implement a SYN cookie protection mechanism for the case of a fast network connection, which allows remote...