{"id":"CVE-2025-68383","aliases":["GHSA-2mj3-6grc-px38","GO-2025-4252"],"title":"Filebeat Beats has Buffer Overflow via Malformed Syslog Message or Malicious Tokenizer Pattern in Dissect Configuration","summary":"Filebeat Beats has Buffer Overflow via Malformed Syslog Message or Malicious Tokenizer Pattern in Dissect Configuration","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","vendor":"elastic","product":"github.com/elastic/beats/v7","ecosystem":"go","affected":["github.com/elastic/beats/v7 >= 7.7.0, < 8.19.9","github.com/elastic/beats/v7 >= 9.0.0, < 9.1.9","github.com/elastic/beats/v7 >= 9.2.0, < 9.2.3","github.com/elastic/beats/v7 < 7.0.0-alpha2.0.20251204214633-dd3af18220bf","github.com/elastic/beats <= 7.6.2"],"patched":["github.com/elastic/beats/v7 8.19.9","github.com/elastic/beats/v7 9.1.9","github.com/elastic/beats/v7 9.2.3","github.com/elastic/beats/v7 7.0.0-alpha2.0.20251204214633-dd3af18220bf"],"published":"2025-12-19","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:31.294125666Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-2mj3-6grc-px38","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-68383"},{"url":"https://github.com/elastic/beats/commit/27a168fb1c598d4a16748e9a7382bc0d197335a5"},{"url":"https://github.com/elastic/beats/commit/2f971a057eea68e057b47829950cd8c26805df30"},{"url":"https://github.com/elastic/beats/commit/339fa3f887a14c91e0c955b50a3b8819393bd632"},{"url":"https://discuss.elastic.co/t/filebeat-8-19-9-9-1-9-and-9-2-3-security-update-esa-2025-32/384180"},{"url":"https://github.com/elastic/elasticsearch"}],"tags":["osv","go"],"epss":0.00191,"epssPercentile":0.07704,"ingestedAt":"2026-09-12T03:13:01.745Z","slug":"CVE-2025-68383","body":"## Overview\n\nImproper Validation of Specified Index, Position, or Offset in Input (CWE-1285) in Filebeat Syslog parser and the Libbeat Dissect processor can allow a user to trigger a Buffer Overflow (CAPEC-100) and cause a denial of service (panic/crash) of the Filebeat process via either a malformed Syslog message or a malicious tokenizer pattern in the Dissect configuration.\n\n## Affected packages\n\n- `github.com/elastic/beats/v7 >= 7.7.0, < 8.19.9`\n- `github.com/elastic/beats/v7 >= 9.0.0, < 9.1.9`\n- `github.com/elastic/beats/v7 >= 9.2.0, < 9.2.3`\n- `github.com/elastic/beats/v7 < 7.0.0-alpha2.0.20251204214633-dd3af18220bf`\n- `github.com/elastic/beats <= 7.6.2`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/elastic/beats/v7 8.19.9`\n- `github.com/elastic/beats/v7 9.1.9`\n- `github.com/elastic/beats/v7 9.2.3`\n- `github.com/elastic/beats/v7 7.0.0-alpha2.0.20251204214633-dd3af18220bf`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}