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virtio-net: Ensure that TCP packets don't overflow gso_segs

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-90063

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-90063

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
        "lessThan": "d3d111fe809773edbb4ae121e36253b7d683509a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
        "lessThan": "8f6667a081887c2b59c6f3dd86c1789ada563762",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
        "lessThan": "339f47ae04dcc6b5a730dd6bc70dddc8937c3260",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
        "lessThan": "29bd12c7c5f9d6cf855b87bace18f71e9607f9e8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
        "lessThan": "0e5ed3b98d1d8d251acfdccfeaa607453ad12954",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
        "lessThan": "75c271c48f483af678e514734e10b2452410e08c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7c6d2ecbda83150b2036a2b36b21381ad4667762",
        "lessThan": "c27c449d455aafd9018a3cbab150f1c42c87923f",
        "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"
      },
      {
        "status": "affected",
        "version": "4.14.187",
        "lessThan": "4.15",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "4.19.131",
        "lessThan": "4.20",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.4.46",
        "lessThan": "5.5",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.6.18",
        "lessThan": "5.7",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "include/linux/virtio_net.h"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.7",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.52",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "include/linux/virtio_net.h"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-90063

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#36481 · Revision 1
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Publisher date
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