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TI-2026-39239 Aliases CVE-2026-54345GHSA-6r28-9ppf-4hj5

Integer underflow in gopacket

Priority HIGH 70CWE-191Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

gopacket provides packet processing capabilities for Go. In version 1.6.0 and earlier, the Diameter AVP decoder computes an AVP data length by subtracting a fixed header size from an attacker-controlled AVP Length field, so a vendor-flagged AVP whose Length is smaller than the 12-byte header underflows the unsigned 32-bit value and drives an unbounded allocation of roughly 4 GiB, and two such messages in succession OOM-kill a collector, causing an unauthenticated remote denial of service. This issue is fixed in version 1.6.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0079 56th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed gopacket (gopacket): 1.6.1github.com/gopacket/gopacket (Go): 1.6.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
gopacketgopacketbefore 1.6.11.6.1Patch availableCNA
—github.com/gopacket/gopacket (Go)before 1.6.11.6.1Patch availableGHSA-6r28-9ppf-4hj5
  • gopacket Vendorgopacket Affected before 1.6.1 Fixed in 1.6.1 Patch available CNA
  • github.com/gopacket/gopacket (Go) Vendor— Affected before 1.6.1 Fixed in 1.6.1 Patch available GHSA-6r28-9ppf-4hj5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gopacket:gopacket:*:*:*:*:*:go:*:*before 1.6.1Vulnerablegopacket
  • cpe:2.3:a:gopacket:gopacket:*:*:*:*:*:go:*:* Versions before 1.6.1 Vulnerable ·gopacket

Remediation

  • Fix · CNA gopacket (gopacket) Fixed in 1.6.1
  • Fix · GHSA-6r28-9ppf-4hj5 github.com/gopacket/gopacket (Go) Fixed in 1.6.1 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54345
  2. 2026-10-03 Alias added: GHSA-6r28-9ppf-4hj5
  3. 2026-11-06 Affected versions changed · Red Hat
  4. 2026-11-06 CVSS score added · Red Hat

References

Exploit 1

Patch 1

Other 2

  • TI-2026-39226 Resource allocation without limits in gopacket CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences