FKIE_CVE-2026-90063

Vulnerability from fkie_nvd - Published: 2026-09-17 17:16 - Updated: 2026-09-17 17:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: virtio-net: Ensure that TCP packets don't overflow gso_segs The user can specify any gso_size in a packet crafted with an AF_PACKET PACKET_VNET_HDR socket, even smaller than TCP_MIN_GSO_SIZE = 8. At the same time, GSO_MAX_SIZE = 8 * GSO_MAX_SEGS = 8 * 65535. When the user crafts a packet with gso_size < 8, there is a risk for partial GSO to overflow the 16-bit gso_segs field when dividing the SKB length by gso_size. Adjust gso_size of TCP packets to be at least TCP_MIN_GSO_SIZE = 8. Keep gso_size of UDP GSO packets, as gso_size=1 is valid and explicitly tested at tools/testing/selftests/net/tun.c:649.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e5ed3b98d1d8d251acfdccfeaa607453ad12954
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29bd12c7c5f9d6cf855b87bace18f71e9607f9e8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/339f47ae04dcc6b5a730dd6bc70dddc8937c3260
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/75c271c48f483af678e514734e10b2452410e08c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8f6667a081887c2b59c6f3dd86c1789ada563762
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c27c449d455aafd9018a3cbab150f1c42c87923f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3d111fe809773edbb4ae121e36253b7d683509a
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/virtio_net.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d3d111fe809773edbb4ae121e36253b7d683509a",
              "status": "affected",
              "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
              "versionType": "git"
            },
            {
              "lessThan": "8f6667a081887c2b59c6f3dd86c1789ada563762",
              "status": "affected",
              "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
              "versionType": "git"
            },
            {
              "lessThan": "339f47ae04dcc6b5a730dd6bc70dddc8937c3260",
              "status": "affected",
              "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
              "versionType": "git"
            },
            {
              "lessThan": "29bd12c7c5f9d6cf855b87bace18f71e9607f9e8",
              "status": "affected",
              "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
              "versionType": "git"
            },
            {
              "lessThan": "0e5ed3b98d1d8d251acfdccfeaa607453ad12954",
              "status": "affected",
              "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
              "versionType": "git"
            },
            {
              "lessThan": "75c271c48f483af678e514734e10b2452410e08c",
              "status": "affected",
              "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
              "versionType": "git"
            },
            {
              "lessThan": "c27c449d455aafd9018a3cbab150f1c42c87923f",
              "status": "affected",
              "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bfbaf151efe491e30697e21c8b7ae1b615480873",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6c83456601e65a6dd371ddf595510183d198e9b1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b3ebd9830c6026c98f03f7047c9d608573773f13",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b96fb681ca789629b8ba3da99ca3b2e6fa807f0a",
              "versionType": "git"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.187",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.131",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.46",
              "versionType": "semver"
            },
            {
              "lessThan": "5.7",
              "status": "affected",
              "version": "5.6.18",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/virtio_net.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.7"
            },
            {
              "lessThan": "5.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio-net: Ensure that TCP packets don\u0027t 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",
  "lastModified": "2026-09-17T17:16:55.080",
  "metrics": {},
  "published": "2026-09-17T17:16:55.080",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0e5ed3b98d1d8d251acfdccfeaa607453ad12954"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29bd12c7c5f9d6cf855b87bace18f71e9607f9e8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/339f47ae04dcc6b5a730dd6bc70dddc8937c3260"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/75c271c48f483af678e514734e10b2452410e08c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8f6667a081887c2b59c6f3dd86c1789ada563762"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c27c449d455aafd9018a3cbab150f1c42c87923f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d3d111fe809773edbb4ae121e36253b7d683509a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.