{"id":"CVE-2026-88830","title":"A unit confusion in BusyBox TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message.","summary":"A unit confusion in BusyBox TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange message.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-131"],"vendor":"Red Hat","product":"busybox","affected":["busybox (all versions)"],"published":"2026-09-23","updated":"2026-09-23","sourceUpdated":"2026-09-23T20:17:20.750","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88830","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-88830","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531344","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88830.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88830"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88830"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-23T18:36:12.931893Z"},"ingestedAt":"2026-09-23T17:28:14.849Z","epss":0.00351,"epssPercentile":0.26054,"slug":"CVE-2026-88830","body":"## Overview\n\nA unit confusion in BusyBox TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted ClientKeyExchange 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** · Important · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88830.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}