CVE-2026-54332

HIGH7.5

GoPacket's sFlow ExtendedGatewayFlow decoder: unbounded attacker-controlled allocation (104-byte UDP datagram -> up to 16 GiB make) -> unauthenticated remote DoS

Published Jul 28, 2026

Modified 4 weeks ago

Details

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.

References

WEB

https://github.com/gopacket/gopacket/commit/76119086f5936aacd7088bdf97d565501bb6c4cc

WEB

https://github.com/gopacket/gopacket/releases/tag/v1.6.1

WEB

https://github.com/gopacket/gopacket/security/advisories/GHSA-g6v3-7xmc-w563

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-54332

CVSS Analysis

CVSS v4.0

6.9