Vulnerability details

CVE-2026-65819

gopacket gopacket

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

CVSS 3.1

7.5High

Official 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.

CVSS scores

Score	Version	Source	Vector
7.5High	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

Affected products

Vendor	Product	Versions	Source
gopacket	gopacket	<= 1.7.0	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/gopacket/gopacket/security/advisories/GHSA-8mcr-459q-5mx2 x_refsource_CONFIRM
https://github.com/gopacket/gopacket/commit/210f25fb9b3ca1af2eb649936f78ad6991b6c9c5 x_refsource_MISC
https://github.com/gopacket/gopacket/releases/tag/v1.7.0 x_refsource_MISC

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Details

Published: 2026-08-07
Last updated: 2026-08-11
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.36%

Probability of exploitation in 30 days

30%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-125
Out-of-bounds Read
CWE-400
Uncontrolled Resource Consumption