CVE-2026-54345

High

Description

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductGopacket

PublishedJul 28, 2026

First seenJul 28, 2026

Weakness typeCWE-191CWE-191 CWE-770Allocation of resources without limits

How to fix

Update

gopacket gopacket1.6.1 or later
github.com/gopacket/gopacket1.6.1 or later

Affected products

Product	Affected versions	Fixed in
gopacket gopacket	v < 1.6.1	1.6.1
github.com/gopacket/gopacketGo	v < 1.6.1	1.6.1

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