What’s Vulnerable › Vulnerabilities

CVE-2026-65819: gopacket: Multiple layer decoders panic on crafted packets (out-of-bounds/underflow) enabling unauthenticated remote DoS via DecodingLayerParser

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-07 · updated 2026-09-09
• Weakness: CWE-125

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.

Affected products

• gopacket: through 1.7.0

References

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

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