{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e"
            },
            {
              "fixed": "6080fa3ecfbb4448a3b47368629534c09b6ec750"
            },
            {
              "fixed": "3866d015f33aeedf81338dd99154703bef33faef"
            },
            {
              "fixed": "dbe556972100fabb8e5a1b3d2163831ff07b1e8e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.12.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64216.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix potential UAF in netfs_unlock_abandoned_read_pages()\n\nnetfs_unlock_abandoned_read_pages(rreq) accesses the index of the folios it\nis wanting to unlock and compares that to rreq-\u003eno_unlock_folio so that it\ndoesn't unlock a folio being read for netfs_perform_write() or\nnetfs_write_begin().\n\nHowever, given that netfs_unlock_abandoned_read_pages() is called _after_\nNETFS_RREQ_IN_PROGRESS is cleared, the one folio that it's not allowed to\ndereference is the one specified by -\u003eno_unlock_folio as ownership\nimmediately reverts to the caller.\n\nFix this by storing the folio pointer instead and using that rather than\nthe index.  Also fix netfs_unlock_read_folio() where the same applies.",
  "id": "CVE-2026-64216",
  "modified": "2026-07-28T03:56:03.271499665Z",
  "published": "2026-07-24T15:23:04.673Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3866d015f33aeedf81338dd99154703bef33faef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6080fa3ecfbb4448a3b47368629534c09b6ec750"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dbe556972100fabb8e5a1b3d2163831ff07b1e8e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64216.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64216"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "netfs: Fix potential UAF in netfs_unlock_abandoned_read_pages()"
}