{"id":"CVE-2026-54345","aliases":["GHSA-6r28-9ppf-4hj5","GO-2026-6121"],"url":"https://o3.security/vulnerability/CVE-2026-54345","summary":"GoPacket's Diameter AVP decoder: uint32 underflow on vendor header size leads to unbounded ~4 GiB allocation (unauthenticated remote DoS)","details":"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.","published":"2026-07-28T16:14:12.097Z","modified":"2026-09-09T18:26:45.237894963Z","cvss":null,"epss":{"score":0.00512,"percentile":0.42051,"asOf":"2026-09-11"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/gopacket/gopacket","fixedVersion":"1.6.1"}],"fix":{"url":"https://github.com/gopacket/gopacket/commit/145859d0eaee1a6f5925ffb93851c976449c3311","label":"gopacket/gopacket@145859d"},"references":[{"type":"WEB","url":"https://github.com/gopacket/gopacket/releases/tag/v1.6.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54345.json"},{"type":"ADVISORY","url":"https://github.com/gopacket/gopacket/security/advisories/GHSA-6r28-9ppf-4hj5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54345"},{"type":"FIX","url":"https://github.com/gopacket/gopacket/commit/145859d0eaee1a6f5925ffb93851c976449c3311"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-09T18:26:45.237894963Z"}}