{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-43098",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-43098"
  ],
  "published": "2026-05-06T07:41:37Z",
  "summary": "nfc: s3fwrn5: allocate rx skb before consuming bytes",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: s3fwrn5: allocate rx skb before consuming bytes\n\ns3fwrn82_uart_read() reports the number of accepted bytes to the serdev\ncore. The current code consumes bytes into recv_skb and may already\ndeliver a complete frame before allocating a fresh receive buffer.\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": "6.1.175",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-43098"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/20a57de2e79b797ed75382659d52bf4c7d9cb446"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e4ab0fd1c91882f2a7846b1817781c8741f7f315"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d8c2aa3c4a1ec530a485e46a1c4f1a118bb00156"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7c31f7a599cf00fad3c204092a91a924126c67e4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6d931680a9851481c3243689488eafed08eeff71"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/09822d3d6f68a0cdc4626e0c507324a4927f55a9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5c14a19d5b1645cce1cb1252833d70b23635b632"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-06-01T16:20:16Z"
  }
}