{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2026.10-rc3"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "964ad5b5c91b7be56e443e899d7f873e6aa8c9fc"
            },
            {
              "fixed": "04ca915d5bf39dda5d1bce62d04d2b59d293c5b9"
            }
          ],
          "repo": "https://github.com/u-boot/u-boot",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71971.json"
  },
  "details": "U-Boot before 2026.10-rc3 with CONFIG_IP_DEFRAG enabled contains an out-of-bounds write vulnerability in the __net_defragment() function in net/net.c. Remote attackers can send a crafted IP fragment with non-zero offset and More-Fragments flag set during netboot to corrupt adjacent memory and crash the bootloader.",
  "id": "CVE-2026-71971",
  "modified": "2026-10-02T03:30:25.601532870Z",
  "published": "2026-09-29T21:29:20.055Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71971.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71971"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc3-out-of-bounds-write-in-ip-fragment-reassembly"
    },
    {
      "type": "FIX",
      "url": "https://github.com/u-boot/u-boot/commit/04ca915d5bf39dda5d1bce62d04d2b59d293c5b9"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/u-boot/u-boot"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/u-boot/u-boot/blob/v2026.07/net/net.c#L975"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "U-Boot before 2026.10-rc3 Out-of-Bounds Write in IP Fragment Reassembly"
}