Skip to content
Fencer Intel
high 7.5

CVE-2026-65819 json

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

published 3mo ago modified 2mo ago also EUVD-2026-54609

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

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 through DecodingLayerParser or DecodeFromBytes to trigger an unrecovered panic and remotely deny service. A patch commit is available at 210f25f.

Patch / fix

  • gopacket gopacket 1.7.1
  • telegraf Azure Linux 3.0 1.31.0-31

azure linux advisories AZL-95490

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2026-65819 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-65819 updated cvss 7.5

github.com/gopacket/gopacket: gopacket: Remote Denial of Service via crafted packet processing

  • Red Hat Network Observability Operator network-observability/network-observability-ebpf-agent-rhel9
    affected: workaround, no fix available
  • Red Hat Network Observability (NETOBSERV) 1.12.3 network-observability/network-observability-cli-rhel9 1789986279
    fixed: vendor fix RHSA-2026:70593
  • Red Hat Network Observability (NETOBSERV) 1.12.3 network-observability/network-observability-rhel9-operator 1789979117, network-observability/network-observability-operator-bundle 1789980334, network-observability/network-observability-ebpf-agent-rhel9 1789978991, network-observability/network-observability-console-plugin-rhel9 1789978277, network-observability/network-observability-flowlogs-pipeline-rhel9 1789978651, network-observability/network-observability-console-plugin-pf4-rhel9 1789978275, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • gopacket gopacket

Classification

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

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.