CVE-2026-46234 (GCVE-0-2026-46234)
Vulnerability from cvelistv5
Published
2026-05-28 09:40
Modified
2026-06-14 18:04
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: vsock: fix buffer size clamping order In vsock_update_buffer_size(), the buffer size was being clamped to the maximum first, and then to the minimum. If a user sets a minimum buffer size larger than the maximum, the minimum check overrides the maximum check, inverting the constraint. This breaks the intended socket memory boundaries by allowing the vsk->buffer_size to grow beyond the configured vsk->buffer_max_size. Fix this by checking the minimum first, and then the maximum. This ensures the buffer size never exceeds the buffer_max_size.
Impacted products
Vendor Product Version
Linux Linux Version: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97
Version: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97
Version: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97
Version: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97
Version: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97
Version: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97
Version: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97
Version: b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97
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  "containers": {
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: fix buffer size clamping order\n\nIn vsock_update_buffer_size(), the buffer size was being clamped to the\nmaximum first, and then to the minimum. If a user sets a minimum buffer\nsize larger than the maximum, the minimum check overrides the maximum\ncheck, inverting the constraint.\n\nThis breaks the intended socket memory boundaries by allowing the\nvsk-\u003ebuffer_size to grow beyond the configured vsk-\u003ebuffer_max_size.\n\nFix this by checking the minimum first, and then the maximum. This\nensures the buffer size never exceeds the buffer_max_size."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T18:04:40.556Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f6ec135941d2c1c2dbb87b5ce1783f4f6ac6ccca"
        },
        {
          "url": "https://git.kernel.org/stable/c/caf11dfea5233a69298a1c448bbf8d1639c80536"
        },
        {
          "url": "https://git.kernel.org/stable/c/01ef69785dc3162f588a361ab770b1e312800188"
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        {
          "url": "https://git.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaa"
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        {
          "url": "https://git.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41"
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          "url": "https://git.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160"
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        {
          "url": "https://git.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536"
        },
        {
          "url": "https://git.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227bab"
        }
      ],
      "title": "vsock: fix buffer size clamping order",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46234",
    "datePublished": "2026-05-28T09:40:58.373Z",
    "dateReserved": "2026-05-13T15:03:33.106Z",
    "dateUpdated": "2026-06-14T18:04:40.556Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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