{"id":"CVE-2026-88840","title":"BusyBox TLS get_client_hello() reads past the end of the input buffer when parsing a truncated ClientHello message.","summary":"BusyBox TLS get_client_hello() reads past the end of the input buffer when parsing a truncated ClientHello message.","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-125"],"vendor":"Red Hat","product":"busybox","affected":["busybox (all versions)"],"published":"2026-09-23","updated":"2026-09-23","sourceUpdated":"2026-09-23T19:40:10.000","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88840","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-88840","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531354","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88840.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88840"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88840"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-23T18:29:33.147Z","slug":"CVE-2026-88840","body":"## Overview\n\nBusyBox TLS get_client_hello() reads past the end of the input buffer when parsing a truncated ClientHello message.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88840.json)","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}