{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "87cf65601e1709e57f7e28f0f7b3eb0a992c1782"
            },
            {
              "fixed": "6807ff49bf796b3823b1e29f97b69316a40a9a94"
            },
            {
              "fixed": "0c5c65a17db729fc63ab656bdaaf0e675a9dbeac"
            },
            {
              "fixed": "6053620fdbcd89fa7e755644efdaab78e0daaae7"
            },
            {
              "fixed": "d4e1946bea8d6441835eb3fd09b19237ba366a6f"
            },
            {
              "fixed": "a23b1b1aaf41e174181d5853a70e65d4d01e648c"
            },
            {
              "fixed": "c183d5775129a0a7495bd61a6e57ec230dcf01e5"
            },
            {
              "fixed": "ebf75c6301c4972a87542ebf2d994c6391eb5d46"
            },
            {
              "fixed": "9989938d13cc5ba8447eeed5a61acfcf61bc6801"
            },
            {
              "fixed": "600dc40554dc5ad1e6f3af51f700228033f43ea7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.31"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.136"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.83"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.20.0"
            },
            {
              "fixed": "7.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31623.json"
  },
  "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-\u003efrags[] 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-\u003efrags overflow in RX path\") did for the\nt7xx driver.",
  "id": "CVE-2026-31623",
  "modified": "2026-07-08T05:37:38.710954204Z",
  "published": "2026-04-24T14:42:40.566Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c5c65a17db729fc63ab656bdaaf0e675a9dbeac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6053620fdbcd89fa7e755644efdaab78e0daaae7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6807ff49bf796b3823b1e29f97b69316a40a9a94"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31623.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31623"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()"
}