{"id":"GO-2026-5051","summary":"Out-of-bounds read and panic in ReadDir in github.com/cloudsoda/go-smb2 and github.com/hirochachacha/go-smb2","details":"ReadDir and ReadDirPlus parse the QUERY_DIRECTORY SMB response by advancing through entries using the server-supplied NextEntryOffset field. The pre-fix code does not bound next against the remaining buffer before re-slicing, and the entry decoder IsInvalid check performs length arithmetic in int after narrowing from uint16.\n\nA guest or anonymous directory listing against an attacker-controlled or man-in-the-middle SMB server crashes the Go client process with a runtime panic when the response contains an entry whose NextEntryOffset is larger than the remaining buffer, or whose declared FileNameLength produces a length that does not match the actual buffer size.","modified":"2026-07-27T17:00:19.805577842Z","published":"2026-07-27T16:16:22Z","database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-5051","review_status":"REVIEWED"},"references":[{"type":"FIX","url":"https://github.com/cloudsoda/go-smb2/commit/7b96c35f5f4babfc9d68a60baf5e85f2303d4a4b"},{"type":"REPORT","url":"https://github.com/golang/vulndb/issues/5051"}],"affected":[{"package":{"name":"github.com/cloudsoda/go-smb2","ecosystem":"Go","purl":"pkg:golang/github.com/cloudsoda/go-smb2"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.0-20260609183447-7b96c35f5f4b"}]}],"ecosystem_specific":{"imports":[{"path":"github.com/cloudsoda/go-smb2","symbols":["Share.ReadDir","Share.ReadDirPlus"]}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-5051.json"}},{"package":{"name":"github.com/hirochachacha/go-smb2","ecosystem":"Go","purl":"pkg:golang/github.com/hirochachacha/go-smb2"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"ecosystem_specific":{"imports":[{"path":"github.com/hirochachacha/go-smb2","symbols":["Share.ReadDir"]}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-5051.json"}}],"schema_version":"1.7.5","credits":[{"name":"Jose Rivas (bl4cksku11)"}]}