NULL pointer write in the wget applet's -T/--timeout handling (networking/wget.c): getopt32() is handed NULL as the -T storage only when busybox is built with CONFIG_WGET but WITHOUT CONFIG_FEATURE_WG

{
  "id": "cc034650b96842c8bf0e752ebd6361f9e26660724036d228900ac1aa2647fe13",
  "url": "https://osv.dev/vulnerability/ECHO-1fcb-1955-3c69",
  "method": "structured",
  "payload": {
    "kind": "withdrawal",
    "title": "NULL pointer write in the wget applet's -T/--timeout handling (networking/wget.c): getopt32() is handed NULL as the -T storage only when busybox is built with CONFIG_WGET but WITHOUT CONFIG_FEATURE_WG",
    "summary": "NULL pointer write in the wget applet's -T/--timeout handling (networking/wget.c): getopt32() is handed NULL as the -T storage only when busybox is built with CONFIG_WGET but WITHOUT CONFIG_FEATURE_WGET_TIMEOUT (\"IF_NOT_FEATURE_WGET_TIMEOUT(NULL)\"). Every busybox Echo ships is built from Debian's own configs, where that combination never occurs: debian/config/pkg/deb and debian/config/pkg/static (busybox, busybox-static, busybox-syslogd, udhcpc, udhcpd) set CONFIG_FEATURE_WGET_TIMEOUT=y, so -T is stored in G.timeout_seconds, and debian/config/pkg/udeb does not build wget at all. Verified on 1:1.38.0-3: a build from debian/config/pkg/deb and Debian's busybox and busybox-static binaries answer \"wget -T 5\" and \"wget --timeout 5\" normally, while the same tree with only FEATURE_WGET_TIMEOUT turned off segfaults on \"wget -T 5\". The cited \"patch\" 83a40bf is a commit in a third-party fork, not in upstream busybox, and bundles unrelated applet changes. Debian rates the CVE unimportant (\"crash in CLI tool, no security impact\").",
    "evidence": "osv:ECHO-1fcb-1955-3c69",
    "products": [
      {
        "name": {
          "value": "busybox",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1:1.38.0-3+e1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "ECHO-1fcb-1955-3c69",
      "aliases": [
        "ECHO-1fcb-1955-3c69"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1:1.38.0-3+e1"
                }
              ]
            }
          ],
          "package": {
            "name": "busybox",
            "purl": "pkg:deb/echo/busybox",
            "ecosystem": "Echo"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-1fcb-1955-3c69.json"
          }
        }
      ],
      "modified": "2026-10-16T13:15:03.125108960Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-76014"
      ],
      "references": [
        "https://advisory.echohq.com/cve/CVE-2026-76014"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-76014",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 340948,
  "published_at": "2026-08-19T22:59:36.669+00:00"
}