{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69"
            },
            {
              "fixed": "4c5d407ba3ff7f30561ff73ba1b07ed70c864edc"
            },
            {
              "fixed": "cefa4265b11176c897a7d9e8e54d89e3701c5584"
            },
            {
              "fixed": "5659e6923cb72f8e18e8b539109ab512455fe195"
            },
            {
              "fixed": "50bb3435a5e627bfbdc52eb4536f49f88b3486b8"
            },
            {
              "fixed": "66288dcadf80974436250e9f70ed848836b835b5"
            },
            {
              "fixed": "43a1e3744548e6fd85873e6fb43e293eb4010694"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.13.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.142"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.92"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "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-2026-64015.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsecurity/keys: fix missed RCU read section on lookup\n\nNicholas Carlini reports that the keyring code calls assoc_array_find()\nin find_key_to_update() without holding the RCU read lock, while the\nassoc_array_gc() code really is designed around removing the node from\nthe tree and then freeing it after an RCU grace-period.\n\nThe regular key handling doesn't see this because holding the keyring\nsemaphore hides any lifetime issues, but the persistent key handling\nuses a different model.\n\nInstead of extending the keyring locking, just do the simple RCU locking\nthat the assoc_array was designed for.",
  "id": "CVE-2026-64015",
  "modified": "2026-07-22T05:30:06.862029990Z",
  "published": "2026-07-19T15:39:10.557Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43a1e3744548e6fd85873e6fb43e293eb4010694"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c5d407ba3ff7f30561ff73ba1b07ed70c864edc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50bb3435a5e627bfbdc52eb4536f49f88b3486b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5659e6923cb72f8e18e8b539109ab512455fe195"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/66288dcadf80974436250e9f70ed848836b835b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cefa4265b11176c897a7d9e8e54d89e3701c5584"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64015.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64015"
    },
    {
      "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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "security/keys: fix missed RCU read section on lookup"
}