---
id: CVE-2026-65819
title: gopacket provides packet processing capabilities for Go
summary: >-
  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 …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-125
  - CWE-400
  - CWE-805
published: '2026-08-07'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:02:22.660'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65819'
references:
  - url: >-
      https://github.com/gopacket/gopacket/commit/210f25fb9b3ca1af2eb649936f78ad6991b6c9c5
    label: security-advisories@github.com
  - url: 'https://github.com/gopacket/gopacket/releases/tag/v1.7.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/gopacket/gopacket/security/advisories/GHSA-8mcr-459q-5mx2
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-65819.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-65819'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2512626'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-65819'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65819'
  - url: 'https://access.redhat.com/errata/RHSA-2026:70593'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00361
epssPercentile: 0.29939
ingestedAt: '2026-09-09T21:22:45.524Z'
vendor: Red Hat
product: Network Observability (NETOBSERV) 1.12.3
affected:
  - network_observability_operator
  - network_observability_netobserv 1.12.3
patched:
  - network_observability_netobserv 1.12.3
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:70593** · Red Hat · fixed in: Network Observability (NETOBSERV) 1.12.3 · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70593)
- **Red Hat VEX** · Important · affected: Network Observability Operator · no fix planned: Network Observability Operator · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-65819.json)