gopacket up to 1.6.0 sFlow ExtendedGatewayFlow Decoder layers/sflow.go allocation of resources

Summaryinfo

A vulnerability marked as problematic has been reported in gopacket up to 1.6.0. Affected by this vulnerability is an unknown functionality of the file layers/sflow.go of the component sFlow ExtendedGatewayFlow Decoder. The manipulation leads to allocation of resources. This vulnerability is listed as CVE-2026-54332. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in gopacket up to 1.6.0. This issue affects an unknown code of the file layers/sflow.go of the component sFlow ExtendedGatewayFlow Decoder. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. The summary by CVE is:

gopacket provides packet processing capabilities for Go. In version 1.6.0 and earlier, the sFlow ExtendedGatewayFlow decoder in layers/sflow.go reads an attacker-controlled 32-bit community count and AS path member count and sizes a slice allocation from those counts without bounding them against the bytes remaining in the datagram, so a 104-byte UDP datagram can drive an allocation of up to 16 GiB and cause an unauthenticated remote denial of service. This issue is fixed in version 1.6.1.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-54332 since 06/12/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 1.6.1 eliminates this vulnerability.

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Productinfo

Name

• gopacket

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6.0

Website

• Product: https://github.com/gopacket/gopacket/

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