CVE-2026-7473---Arista-EOS-Tunnel-Decapsulation-Bypass

README.md markdown CVE-2026-7473 - Arista EOS Tunnel Decapsulation Bypass ⚠️ WARNING This code is ONLY for educational purposes and authorized security testing. 📋 Description CVE-2026-7473 is a vulnerability in Arista EOS where a switch configured as a tunnel endpoint VXLAN, GRE, decap-groups...

CVE-2026-20221

Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine. This vulnerability is...

CVE-2026-20221 Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerabilities

Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine. This vulnerability is...

CVE-2026-20221

Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine 's generic routing encapsulation (GRE) tunnel decapsulation feature. The root cause is the improper handling of nested GRE traffic , which allows an unauthenticated, remote attacker to send a crafted GRE paylo...

CVE-2026-20221 Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerabilities

Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine. This vulnerability is...

EUVD-2026-107378

Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine. This vulnerability is...

Cisco FTD: CVE-2026-20221: Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerability

Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine. This vulnerability is...

PT-2026-120685

Name of the Vulnerable Software and Affected Versions Cisco products affected versions not specified Description A flaw exists in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine. The issue stems from improper handling of nested GRE traffic, which...

Multiple Cisco Products Snort 3 Generic Routing Encapsulation DoS (cisco-sa-snort3-gre-JNpMHrTv)

According to its self-reported version, Cisco ASA Software is affected by a vulnerability. - Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation GRE tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote...

Cisco Cyber Vision Improper Exception Handling Vulnerabilities

Cisco Cyber Vision has a vulnerability in exception handling. This vulnerability stems from the GRE tunnel decapsulation function in the Snort 3 Detection Engine, which improperly processes nested GRE traffic. Unauthenticated remote attackers can send custom GRE payloads through the affected...

CVE-2026-98401

A flaw was found in the Linux kernel's networking subsystem. When processing encapsulated network packets, the kernel fails to reset the transport header offset after stripping outer packet headers during tunnel decapsulation. A remote attacker could exploit this vulnerability by sending speciall...

DEBIAN-CVE-2026-98401

In the Linux kernel, the following vulnerability has been resolved: net: iptunnel: fix stale transport header during tunnel decapsulation Syzbot reported a crash in qdiscpktlensegsinit caused by a stale transportheader offset after tunnel decapsulation. BUG: unable to handle page fault for addres...

CVE-2026-98401

In the Linux kernel, the following vulnerability has been resolved: net: iptunnel: fix stale transport header during tunnel decapsulation Syzbot reported a crash in qdiscpktlensegsinit caused by a stale transportheader offset after tunnel decapsulation. BUG: unable to handle page fault for addres...

UBUNTU-CVE-2026-98401

In the Linux kernel, the following vulnerability has been resolved: net: iptunnel: fix stale transport header during tunnel decapsulation Syzbot reported a crash in qdiscpktlensegsinit caused by a stale transportheader offset after tunnel decapsulation. BUG: unable to handle page fault for addres...

CVE-2026-98401 net: iptunnel: fix stale transport header during tunnel decapsulation

In the Linux kernel, the following vulnerability has been resolved: net: iptunnel: fix stale transport header during tunnel decapsulation Syzbot reported a crash in qdiscpktlensegsinit caused by a stale transportheader offset after tunnel decapsulation. BUG: unable to handle page fault for addres...

CVE-2026-98401

In the Linux kernel, the following vulnerability has been resolved: net: iptunnel: fix stale transport header during tunnel decapsulation Syzbot reported a crash in qdiscpktlensegsinit caused by a stale transportheader offset after tunnel decapsulation. BUG: unable to handle page fault for addres...

CVE-2026-98401 net: iptunnel: fix stale transport header during tunnel decapsulation

In the Linux kernel, the following vulnerability has been resolved: net: iptunnel: fix stale transport header during tunnel decapsulation Syzbot reported a crash in qdiscpktlensegsinit caused by a stale transportheader offset after tunnel decapsulation. BUG: unable to handle page fault for addres...

CVE-2026-98401

A flaw in the Linux kernel networking subsystem allows a Denial of Service (DoS) via a kernel crash. When processing encapsulated packets with GSO metadata , the kernel fails to reset the transport header offset after stripping outer headers during tunnel decapsulation. If the inner frame is forw...

Linux Distros Unpatched Vulnerability : CVE-2026-98401

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net: iptunnel: fix stale transport header during tunnel decapsulation Syzbot reported a crash in qdiscpktlensegsinit caused by a stale transportheader offset...

Arista Networks EOS Tunnel Decapsulation Improper Validation (SA0137)

On affected platforms running Arista EOS where a tunnel decapsulation configuration - such as VXLAN Virtual Extensible LAN, decap-groups, or a GRE Generic Routing Encapsulation tunnel interface - is present, the switch will incorrectly decapsulate and forward other unexpected tunneled packets wit...