{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-88840", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-09-10T09:42:04.559Z", "datePublished": "2026-09-23T17:45:34.724Z", "dateUpdated": "2026-09-23T17:45:34.724Z" }, "containers": { "cna": { "title": "Busybox: busybox: tls ssl_server reads one byte out of bounds when parsing truncated clienthello", "metrics": [ { "other": { "content": { "value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1" }, "format": "CVSS" } ], "descriptions": [ { "lang": "en", "value": "BusyBox TLS get_client_hello() reads past the end of the input buffer when parsing a truncated ClientHello message." } ], "affected": [ { "vendor": "Red Hat", "product": "Red Hat Hardened Images", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "busybox", "defaultStatus": "affected", "cpes": [ "cpe:/a:redhat:hummingbird:1" ] } ], "references": [ { "url": "https://access.redhat.com/security/cve/CVE-2026-88840", "tags": [ "vdb-entry", "x_refsource_REDHAT" ] }, { "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2531354", "name": "RHBZ#2531354", "tags": [ "issue-tracking", "x_refsource_REDHAT" ] } ], "datePublic": "2026-09-23T16:35:00.000Z", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-125", "description": "Out-of-bounds Read", "lang": "en", "type": "CWE" } ] } ], "x_redhatCweChain": "CWE-125: Out-of-bounds Read", "workarounds": [ { "lang": "en", "value": "Do not use BusyBox ssl_server in production deployments. Upstream should add a bounds check to verify len > 0 before reading the compression-methods length byte." } ], "timeline": [ { "lang": "en", "time": "2026-09-09T00:00:00.000Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-09-23T16:35:00.000Z", "value": "Made public." } ], "providerMetadata": { "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-09-23T17:45:34.724Z" }, "x_generator": { "engine": "cvelib 1.8.0" } } } }