{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f43798c27684ab925adde7d8acc34c78c6e50df8"
            },
            {
              "fixed": "a464d950f31c89565cbaae038cc60db04fe01956"
            },
            {
              "fixed": "0fab003ef4698e0628060a45a48f14b43ba2a40a"
            },
            {
              "fixed": "94524b7b32691de2e2ce162c04d6cbc9106e5cbf"
            },
            {
              "fixed": "a65f69e0f38ffbed1b128029e09097436416dc8b"
            },
            {
              "fixed": "32a8b0adaa18e52aaa0b246b5ffe683075354dbb"
            },
            {
              "fixed": "f3e835af6226f1dd12160cbd696081e9b6155de0"
            },
            {
              "fixed": "c3e33464746166264334641dc850a36eef7e6326"
            },
            {
              "fixed": "6785011f8b16abf40b1e9d8b2e332232b3e68822"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.27"
            },
            {
              "fixed": "5.10.272"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.223"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.190"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.159"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.57"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99999.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: validate checksum_start before completing checksum\n\nIf a packet with bad checksum metadata gets into the ipv4 stack,\nskb_checksum_help can corrupt the network header and cause a bunch of\nmischief.\n\nThis was discovered and reported by Paulos, and has been reporoduced\nby others independently since.\n\nWe really shouldn't allow such packets in, but as a defence\nin depth measure, let's also check before we complete the checksum.\n\nA more complete validation at input is forthcoming, but needs more work.",
  "id": "CVE-2026-99999",
  "modified": "2026-10-16T10:30:54.417956695Z",
  "published": "2026-10-15T12:19:22.784Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/10/15/5"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0fab003ef4698e0628060a45a48f14b43ba2a40a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32a8b0adaa18e52aaa0b246b5ffe683075354dbb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6785011f8b16abf40b1e9d8b2e332232b3e68822"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94524b7b32691de2e2ce162c04d6cbc9106e5cbf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a464d950f31c89565cbaae038cc60db04fe01956"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a65f69e0f38ffbed1b128029e09097436416dc8b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c3e33464746166264334641dc850a36eef7e6326"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3e835af6226f1dd12160cbd696081e9b6155de0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99999.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99999"
    },
    {
      "type": "ARTICLE",
      "url": "https://pwn.ai/blog/Pwnescape"
    },
    {
      "type": "ARTICLE",
      "url": "https://vercel.com/blog/findings-from-the-1-million-dollar-vercel-sandbox-challenge"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ipv4: validate checksum_start before completing checksum"
}