nmap-farewell

nmap-farewell 该工具旨在演示 Linux 内核 nfnetlinkqueue 功能的强大之处。 如需更深入的信息，可以阅读这篇文章。 在数据包被内核丢弃之前，它们会被发送到该工具进行进一步处理。 如果远程对端尝试访问您机器上过多的关闭端口，它将通过在网络协议栈中极早插入一条丢弃其 IP 地址的规则（在任何数据包分片重组或连接跟踪之前）而自动被禁用。 被禁用的 IP 会在指定时间段后自动解禁，这在以下情况下非常有用： 您不小心将自己锁在远程服务器之外 您封禁了一个日后会被分配给其他人的公网 IP 地址 您封禁了一个在另一个局域网中可能属于不同机器的私网 IP...

Important: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: do shared-unconfirmed check before segmentation CVE-2026-45859 In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: use listdelrcu for netlink hooks...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: perform a shared-unconfirmed check before segmentation. Ulrich reports a regression with nfqueue: If an application does not set the ‘FGSO’ capability flag, and a gso packet with an unconfirmed nfconn...

CVE-2026-45859

A flaw was found in the Linux kernel's netfilter nfnetlinkqueue component. This vulnerability occurs when an application does not set the FGSO capability flag and a Generic Segmentation Offload GSO packet with an unconfirmed netfilter connection nfconn entry is received. Due to an incorrect order...

EUVD-2026-32325

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: do shared-unconfirmed check before segmentation Ulrich reports a regression with nfqueue: If an application did not set the 'FGSO' capability flag and a gso packet with an unconfirmed nfconn entry is...

CVE-2026-45859

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: do shared-unconfirmed check before segmentation Ulrich reports a regression with nfqueue: If an application did not set the 'FGSO' capability flag and a gso packet with an unconfirmed nfconn entry is...

AZL-88478 CVE-2026-45859 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: do shared-unconfirmed check before segmentation Ulrich reports a regression with nfqueue: If an application did not set the 'FGSO' capability flag and a gso packet with an unconfirmed nfconn entry is...

CVE-2026-45859 netfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: do shared-unconfirmed check before segmentation Ulrich reports a regression with nfqueue: If an application did not set the 'FGSO' capability flag and a gso packet with an unconfirmed nfconn entry is...

CVE-2026-45859 netfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: do shared-unconfirmed check before segmentation Ulrich reports a regression with nfqueue: If an application did not set the 'FGSO' capability flag and a gso packet with an unconfirmed nfconn entry is...

CVE-2026-45859

The CVE-2026-45859 entry describes a Linux kernel netfilter nfnetlink_queue issue where a shared-unconfirmed nf_conn entry is not checked before segmentation, causing UDP packets to be dropped instead of queued when F_GSO is not set and a GSO packet arrives. The regression arose due to the check ...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the netfilter nfnetlinkqueue module failing to properly check shared unconfirmed connections befo...

CVE-2026-45859

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: do shared-unconfirmed check before segmentation Ulrich reports a regression with nfqueue: If an application did not set the 'FGSO' capability flag and a gso packet with an unconfirmed nfconn entry is...

CVE-2026-43451

A flaw was found in the Linux kernel's netfilter component. A remote attacker can exploit this by sending specially crafted network packets that cause an error during VLAN attribute parsing in the nfnetlinkqueue module. This leads to a memory leak, where kernel memory is not properly released...

CVE-2026-43451

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: fix entry leak in bridge verdict error path nfqnlrecvverdict calls finddequeueentry to remove the queue entry from the queue data structures, taking ownership of the entry. For PFBRIDGE packets, it then...

CVE-2026-43451 netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: fix entry leak in bridge verdict error path nfqnlrecvverdict calls finddequeueentry to remove the queue entry from the queue data structures, taking ownership of the entry. For PFBRIDGE packets, it then...

CVE-2026-43451

Summary of CVE-2026-43451 (Linux kernel): The nfnetlink_queue entry leak occurs in the bridge verdict error path. When nfqnl_recv_verdict() dequeues an entry for PF_BRIDGE packets and nfqa_parse_bridge() returns an error (for example VLAN TCI missing when VLAN is present), the code returns withou...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, caused by an error in the bridge decision-making process in the netfilter nfnetlinkqueue module. This issue may le...

SUSE CVE-2026-43084

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: make hash table per queue Sharing a global hash table among all queues is tempting, but it can cause crash: BUG: KASAN: slab-use-after-free in nfqnlrecvverdict+0x11ac/0x15e0 nfnetlinkqueue...

CVE-2026-43084

A flaw was found in the Linux kernel's netfilter component. This vulnerability, a use-after-free, occurs due to the sharing of a global hash table among all queues in nfnetlinkqueue. This allows a parallel CPU to access a nfqueueentry after it has been freed, leading to a system crash and a Denia...

EUVD-2026-27578

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: make hash table per queue Sharing a global hash table among all queues is tempting, but it can cause crash: BUG: KASAN: slab-use-after-free in nfqnlrecvverdict+0x11ac/0x15e0 nfnetlinkqueue...