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CVE-2026-65819— gopacket: Multiple layer decoders panic on crafted packets (out-of-bounds/underflow) enabling unauthenticated remote DoS via DecodingLayerParser

Quick assessment

Affected
gopacket gopacket
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Gopacket GoPacket是Gopacket组织开源的一款网络数据包处理库。 GoPacket 1.7.0及之前版本存在安全漏洞，该漏洞源于多个层解码器在验证之前使用攻击者控制的长度、计数或偏移量，可能导致特制数据包通过DecodingLayerParser或DecodeFromBytes解码时触发不可恢复的panic并远程拒绝服务。

CVSS 7.5 · High EPSS 0.66% · P51

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
gopacket gopacket <= 1.7.0 affected
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I. Basic Information for CVE-2026-65819

Vulnerability Information
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Vulnerability Title
gopacket: Multiple layer decoders panic on crafted packets (out-of-bounds/underflow) enabling unauthenticated remote DoS via DecodingLayerParser
Source: CVE Program / CVE List V5
Vulnerability Description
gopacket provides packet processing capabilities for Go. Through version 1.7.0, multiple layer decoders use attacker-controlled lengths, counts, or offsets before validating them against packet buffers, allowing a crafted packet decoded through DecodingLayerParser or DecodeFromBytes to trigger an unrecovered panic and remotely deny service. A patch commit is available at 210f25f.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
GoPacket 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gopacket GoPacket是Gopacket组织开源的一款网络数据包处理库。 GoPacket 1.7.0及之前版本存在安全漏洞，该漏洞源于多个层解码器在验证之前使用攻击者控制的长度、计数或偏移量，可能导致特制数据包通过DecodingLayerParser或DecodeFromBytes解码时触发不可恢复的panic并远程拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
gopacket gopacket <= 1.7.0 -

II. Public POCs for CVE-2026-65819

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9700 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-65819

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Patches & Fixes for CVE-2026-65819 (1)

Vendor Advisories for CVE-2026-65819 (1)

Vendor Pages for CVE-2026-65819 (1)

IV. Related Vulnerabilities

Same product: gopacket
Same vendor: gopacket
Same weakness: CWE-125