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CVE-2026-97618

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

io_uring/net: don't overconsume buffers when using MSG_TRUNC

When a recv/recvmsg is issued with MSG_TRUNC and the incoming packet is larger than the provided buffer, the net layer returns the full length of the packet rather than the number of bytes actually copied into the buffer. As a result, io_uring advances more of the provided buffer ring than was actually filled. Use the actual filled region size to consume the buffer, but still return the full size to preserve MSG_TRUNC semantics.

Take care with multishot, because that seems to already truncate the consumption based on the available payload size.

Leer descripción completaMostrar menos

This was reported in https://github.com/axboe/liburing/issues/1619.

[axboe: fold in size_t unsigned fix]

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-97618",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "ae98dbf43d755b4e111fcd086e53939bef3e9a1a",
              "lessThan": "41d24d2fb168fa05fcaf9ec4e55478411dbbf8e1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ae98dbf43d755b4e111fcd086e53939bef3e9a1a",
              "lessThan": "927d96f91c582b319d104ecf50ec935a8dc29193",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ae98dbf43d755b4e111fcd086e53939bef3e9a1a",
              "lessThan": "2e70ea75c7bb38a6dc212975f887310f14f7c043",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ae98dbf43d755b4e111fcd086e53939bef3e9a1a",
              "lessThan": "6028b543884f8735e057ec9eea4908cd61cab230",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "io_uring/net.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "io_uring/net.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-25T11:17:16.000",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2e70ea75c7bb38a6dc212975f887310f14f7c043",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/41d24d2fb168fa05fcaf9ec4e55478411dbbf8e1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6028b543884f8735e057ec9eea4908cd61cab230",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/927d96f91c582b319d104ecf50ec935a8dc29193",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/net: don't overconsume buffers when using MSG_TRUNC\n\nWhen a recv/recvmsg is issued with MSG_TRUNC and the incoming packet is\nlarger than the provided buffer, the net layer returns the full length\nof the packet rather than the number of bytes actually copied into the\nbuffer.  As a result, io_uring advances more of the provided buffer ring\nthan was actually filled.  Use the actual filled region size to consume\nthe buffer, but still return the full size to preserve MSG_TRUNC\nsemantics.\n\nTake care with multishot, because that seems to already truncate the\nconsumption based on the available payload size.\n\nThis was reported in https://github.com/axboe/liburing/issues/1619.\n\n[axboe: fold in size_t unsigned fix]"
    }
  ],
  "lastModified": "2026-10-03T11:18:08.030",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}