{"schemaVersion":3,"id":"CVE-2021-43668","aliases":["UBUNTU-CVE-2021-43668","GHSA-5m8f-chrv-7rw5"],"status":"published","duplicateOf":null,"title":null,"description":"Go-Ethereum 1.10.9 nodes crash (denial of service) after receiving a serial of messages and cannot be recovered. They will crash with \"runtime error: invalid memory address or nil pointer dereference\" and arise a SEGV signal.","dates":{"published":"2021-11-18T15:05:20.000Z","modified":"2024-08-04T04:03:08.581Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":4.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Go","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":4.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.5,"severity":"medium","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":2.1,"severity":"low","vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00259,"percentile":0.16566,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00259},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00259,"percentile":0.16566}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00259,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00259,"percentile":0.16566}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-476","name":"NULL Pointer Dereference","description":"The product dereferences a pointer that it expects to be valid but is NULL.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/476.html"}],"affected":[{"vendor":"ubuntu","product":"golang-goleveldb","name":"golang-goleveldb","label":"golang-goleveldb","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/golang-goleveldb","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ethereum","product":"go_ethereum","name":"go ethereum","label":"go_ethereum","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"1.10.9","noFixRecorded":false,"fixedIn":null}],"versionsText":"1.10.9","eol":null,"hubHref":"/vendor/ethereum/go_ethereum"},{"vendor":"github.com/ethereum","product":"go-ethereum","name":"github.com/ethereum/go-ethereum","label":"go-ethereum","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/ethereum/go-ethereum","purlType":"golang","versions":[{"text":"≤ 1.10.9","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 1.10.9","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/ethereum/go-ethereum/issues/23866","label":"github.com/ethereum/go-ethereum/issues/23866","hostname":"github.com","tags":["X Refsource MISC","REPORT","WEB","Third Party Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-43668","label":"ubuntu.com/security/CVE-2021-43668","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-43668","label":"www.cve.org/CVERecord?id=CVE-2021-43668","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43668","label":"nvd.nist.gov/vuln/detail/CVE-2021-43668","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/syndtr/goleveldb/issues/373","label":"github.com/syndtr/goleveldb/issues/373","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/ethereum/go-ethereum","label":"github.com/ethereum/go-ethereum","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-11-18T15:05:20.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T04:03:08.581Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":22,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T10:39:32.510Z","stale":false,"partial":false}}