{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-31623",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-31623"
  ],
  "published": "2026-04-24T14:43:40Z",
  "summary": "net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()\n\nA malicious USB device claiming to be a CDC Phonet modem can overflow\nthe skb_shared_info->frags[] array by sending an unbounded sequence of\nfull-page bulk transfers.\n\nDrop the skb and increment the length error when the frag limit is\nreached.  This matches the same fix that commit f0813bcd2d9d (\"net:\nwwan: t7xx: fix potential skb->frags overflow in RX path\") did for the\nt7xx driver.",
  "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-2026-31623"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6807ff49bf796b3823b1e29f97b69316a40a9a94"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0c5c65a17db729fc63ab656bdaaf0e675a9dbeac"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6053620fdbcd89fa7e755644efdaab78e0daaae7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-06-15T02:03:26Z"
  }
}