{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2026.10-rc5"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "a06e89ab05eaa2b8344d521319399333cd760ae5"
            },
            {
              "fixed": "1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fd"
            }
          ],
          "repo": "https://github.com/u-boot/u-boot",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-195"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74221.json"
  },
  "details": "U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_readlink_reply() function in net/nfs-common.c when processing NFS server responses. A malicious NFS server can send crafted READLINK replies with negative or oversized symlink length values to corrupt memory and crash the bootloader.",
  "id": "CVE-2026-74221",
  "modified": "2026-10-02T03:31:09.727128427Z",
  "published": "2026-09-29T21:29:23.283Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74221.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74221"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-buffer-overflow-via-nfs-readlink"
    },
    {
      "type": "FIX",
      "url": "https://github.com/u-boot/u-boot/commit/1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fd"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/u-boot/u-boot"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/u-boot/u-boot/blob/v2026.07/net/nfs-common.c#L643"
    }
  ],
  "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-rc5 Buffer Overflow via NFS READLINK"
}