{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-31660",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-31660"
  ],
  "published": "2026-04-24T14:47:31Z",
  "summary": "nfc: pn533: allocate rx skb before consuming bytes",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: pn533: allocate rx skb before consuming bytes\n\npn532_receive_buf() reports the number of accepted bytes to the serdev\ncore. The current code consumes bytes into recv_skb and may already hand\na complete frame to pn533_recv_frame() before allocating a fresh receive\nbuffer.\n\nIf that alloc_skb() fails, the callback returns 0 even though it has\nalready consumed bytes, and it leaves recv_skb as NULL for the next\nreceive callback. That breaks the receive_buf() accounting contract and\ncan also lead to a NULL dereference on the next skb_put_u8().\n\nAllocate the receive skb lazily before consuming the next byte instead.\nIf allocation fails, return the number of bytes already accepted.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.169",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-31660"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2ca64fb7e2d2ae14619dd204d4f2f0a601f421fb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8b71299d587d9e4c830c18afb884c80ddb30ad28"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/16649adc2e19509104245ea1f349b629d858f11f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/07cb6c72e66ba548679f22ac29ad588da8999279"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a9495069b43b8634c1ae0042e888766c34f66637"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/21ae2cda66a55c759607bbf1d23cbaa42019d2de"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7e37da42eda45d7859d9273fc7e225d8df458038"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c71ba669b570c7b3f86ec875be222ea11dacb352"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}