{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-68245",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-68245",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-16T14:21:22.348Z",
    "updatedAt": "2026-05-11T21:49:38.460Z",
    "importedAt": "2026-10-24T01:57:44.935Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "net: netpoll: fix incorrect refcount handling causing incorrect cleanup",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: netpoll: fix incorrect refcount handling causing incorrect cleanup\n\ncommit efa95b01da18 (\"netpoll: fix use after free\") incorrectly\nignored the refcount and prematurely set dev->npinfo to NULL during\nnetpoll cleanup, leading to improper behavior and memory leaks.\n\nScenario causing lack of proper cleanup:\n\n1) A netpoll is associated with a NIC (e.g., eth0) and netdev->npinfo is\n   allocated, and refcnt = 1\n   - Keep in mind that npinfo is shared among all netpoll instances. In\n     this case, there is just one.\n\n2) Another netpoll is also associated with the same NIC and\n   npinfo->refcnt += 1.\n   - Now dev->npinfo->refcnt = 2;\n   - There is just one npinfo associated to the netdev.\n\n3) When the first netpolls goes to clean up:\n   - The first cleanup succeeds and clears np->dev->npinfo, ignoring\n     refcnt.\n     - It basically calls `RCU_INIT_POINTER(np->dev->npinfo, NULL);`\n   - Set dev->npinfo = NULL, without proper cleanup\n   - No ->ndo_netpoll_cleanup() is either called\n\n4) Now the second target tries to clean up\n   - The second cleanup fails because np->dev->npinfo is already NULL.\n     * In this case, ops->ndo_netpoll_cleanup() was never called, and\n       the skb pool is not cleaned as well (for the second netpoll\n       instance)\n  - This leaks npinfo and skbpool skbs, which is clearly reported by\n    kmemleak.\n\nRevert commit efa95b01da18 (\"netpoll: fix use after free\") and adds\nclarifying comments emphasizing that npinfo cleanup should only happen\nonce the refcount reaches zero, ensuring stable and correct netpoll\nbehavior.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8e6a50edad11e3e1426e4c29e7aa6201f3468ac2"
            },
            {
              "version": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9b0bb18b4b9dc017c1825a2c5e763615e34a1593"
            },
            {
              "version": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
              "status": "affected",
              "versionType": "git",
              "lessThan": "890472d6fbf062e6de7fdd56642cb305ab79d669"
            },
            {
              "version": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4afd4ebbad52aa146838ec23082ba393e426a2bb"
            },
            {
              "version": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c645693180a98606c430825223d2029315d85e9d"
            },
            {
              "version": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c79a6d9da29219616b118a3adce9a14cd30f9bd0"
            },
            {
              "version": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9a51b5ccd1c79afec1c03a4e1e6688da52597556"
            },
            {
              "version": "efa95b01da18ad22af62f6d99a3243f3be8fd264",
              "status": "affected",
              "versionType": "git",
              "lessThan": "49c8d2c1f94cc2f4d1a108530d7ba52614b874c2"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.17",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.17"
            },
            {
              "version": "5.4.302",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.247",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.197",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.159",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.117",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.59",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}