{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2026.10-rc4"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "b4ac71db13a33c4e6532c60a781ddf34b7f4375a"
            },
            {
              "fixed": "561ae28cb56a082cfa90c1c421c4955bc215470b"
            }
          ],
          "repo": "https://github.com/u-boot/u-boot",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-190"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71973.json"
  },
  "details": "U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader.",
  "id": "CVE-2026-71973",
  "modified": "2026-10-02T03:31:06.822112550Z",
  "published": "2026-09-29T21:29:21.349Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71973.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71973"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc4-integer-overflow-in-squashfs-directory-table-allocation"
    },
    {
      "type": "FIX",
      "url": "https://github.com/u-boot/u-boot/commit/561ae28cb56a082cfa90c1c421c4955bc215470b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/u-boot/u-boot"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/u-boot/u-boot/blob/v2026.07/fs/squashfs/sqfs.c#L814"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:P/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-rc4 Integer Overflow in SquashFS Directory Table Allocation"
}