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CVE-2026-54332— GoPacket's sFlow ExtendedGatewayFlow decoder: unbounded attacker-controlled allocation (104-byte UDP datagram -> up to 16 GiB make) -> unauthenticated remote DoS

Quick assessment

Affected
gopacket gopacket
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 1.6.1之前版本存在资源管理错误漏洞，该漏洞源于sFlow ExtendedGatewayFlow解码器在处理攻击者控制的community count和AS path member count时，未根据数据报剩余字节限制切片分配，导致分配过大内存，造成未认证远程拒绝服务。

CVSS 6.9 · Medium EPSS 0.79% · P56

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
gopacket gopacket < 1.6.1 affected
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I. Basic Information for CVE-2026-54332

Vulnerability Information
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Vulnerability Title
GoPacket's sFlow ExtendedGatewayFlow decoder: unbounded attacker-controlled allocation (104-byte UDP datagram -> up to 16 GiB make) -> unauthenticated remote DoS
Source: CVE Program / CVE List V5
Vulnerability Description
gopacket provides packet processing capabilities for Go. In version 1.6.0 and earlier, the sFlow ExtendedGatewayFlow decoder in layers/sflow.go reads an attacker-controlled 32-bit community count and AS path member count and sizes a slice allocation from those counts without bounding them against the bytes remaining in the datagram, so a 104-byte UDP datagram can drive an allocation of up to 16 GiB and cause an unauthenticated remote denial of service. This issue is fixed in version 1.6.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
GoPacket 资源管理错误漏洞
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 1.6.1之前版本存在资源管理错误漏洞，该漏洞源于sFlow ExtendedGatewayFlow解码器在处理攻击者控制的community count和AS path member count时，未根据数据报剩余字节限制切片分配，导致分配过大内存，造成未认证远程拒绝服务。
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 < 1.6.1 -

II. Public POCs for CVE-2026-54332

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III. Intelligence Information for CVE-2026-54332

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Patches & Fixes for CVE-2026-54332 (1)

Vendor Advisories for CVE-2026-54332 (1)

Vendor Pages for CVE-2026-54332 (1)

IV. Related Vulnerabilities

Same product: gopacket
Same vendor: gopacket
Same weakness: CWE-770