{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7c6d2ecbda83150b2036a2b36b21381ad4667762"
            },
            {
              "fixed": "d3d111fe809773edbb4ae121e36253b7d683509a"
            },
            {
              "fixed": "8f6667a081887c2b59c6f3dd86c1789ada563762"
            },
            {
              "fixed": "339f47ae04dcc6b5a730dd6bc70dddc8937c3260"
            },
            {
              "fixed": "29bd12c7c5f9d6cf855b87bace18f71e9607f9e8"
            },
            {
              "fixed": "0e5ed3b98d1d8d251acfdccfeaa607453ad12954"
            },
            {
              "fixed": "75c271c48f483af678e514734e10b2452410e08c"
            },
            {
              "fixed": "c27c449d455aafd9018a3cbab150f1c42c87923f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "bfbaf151efe491e30697e21c8b7ae1b615480873"
            },
            {
              "last_affected": "6c83456601e65a6dd371ddf595510183d198e9b1"
            },
            {
              "last_affected": "b3ebd9830c6026c98f03f7047c9d608573773f13"
            },
            {
              "last_affected": "b96fb681ca789629b8ba3da99ca3b2e6fa807f0a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "4.14.187"
            },
            {
              "fixed": "4.15"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "4.19.131"
            },
            {
              "fixed": "4.20"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.4.46"
            },
            {
              "fixed": "5.5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.6.18"
            },
            {
              "fixed": "5.7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.7.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90063.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-net: Ensure that TCP packets don't overflow gso_segs\n\nThe user can specify any gso_size in a packet crafted with an AF_PACKET\nPACKET_VNET_HDR socket, even smaller than TCP_MIN_GSO_SIZE = 8. At the\nsame time, GSO_MAX_SIZE = 8 * GSO_MAX_SEGS = 8 * 65535. When the user\ncrafts a packet with gso_size \u003c 8, there is a risk for partial GSO to\noverflow the 16-bit gso_segs field when dividing the SKB length by\ngso_size.\n\nAdjust gso_size of TCP packets to be at least TCP_MIN_GSO_SIZE = 8. Keep\ngso_size of UDP GSO packets, as gso_size=1 is valid and explicitly\ntested at tools/testing/selftests/net/tun.c:649.",
  "id": "CVE-2026-90063",
  "modified": "2026-09-19T03:30:39.390997180Z",
  "published": "2026-09-17T16:05:46.968Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e5ed3b98d1d8d251acfdccfeaa607453ad12954"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/29bd12c7c5f9d6cf855b87bace18f71e9607f9e8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/339f47ae04dcc6b5a730dd6bc70dddc8937c3260"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75c271c48f483af678e514734e10b2452410e08c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f6667a081887c2b59c6f3dd86c1789ada563762"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c27c449d455aafd9018a3cbab150f1c42c87923f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d3d111fe809773edbb4ae121e36253b7d683509a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90063.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90063"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "virtio-net: Ensure that TCP packets don't overflow gso_segs"
}