{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "eafedbc7c050c44744fbdf80bdf3315e860b7513"
            },
            {
              "fixed": "89b8cc948dce661af87527623b3a41cdd115e2f9"
            },
            {
              "fixed": "74920b1b4e474ba7a4de4323c0458deec49d210b"
            },
            {
              "fixed": "803c8a9502e9b97cd6ae937618ef4a8fd6274343"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.18.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64467.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrust_binder: use a u64 stride when cleaning up the offsets array\n\nAllocation's Drop walks the offsets array (binder_size_t = u64 entries),\ncleaning up the objects, but it used usize instead of u64 for both the\nstride and the per-entry read.\n\nOn 64-bit kernels (usize == u64) this is harmless, but on 32-bit kernels\nit walks the 8-byte entries in 4-byte steps, iterating an N-entry array\n2N times, and reads the always-zero high word as offset 0, cleaning up\nthe object at offset 0 N extra times. As a result the referenced node or\nhandle ends up with a lower reference count than it actually has (a\nrefcount over-decrement), and binder's reference accounting is corrupted;\nfor example, the owner can be notified of a strong reference release\n(BR_RELEASE) even though references still remain.\n\nChange the stride to u64, and read each entry as a u64, narrowing it to\nusize with try_into().\n\nOn 32-bit ARM, when this over-decrement would drive a count below zero,\nthe driver's existing refcount guard refuses it and fires:\n\n  rust_binder: Failure: refcount underflow!",
  "id": "CVE-2026-64467",
  "modified": "2026-08-18T03:30:52.840076427Z",
  "published": "2026-07-25T08:51:32.626Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74920b1b4e474ba7a4de4323c0458deec49d210b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/803c8a9502e9b97cd6ae937618ef4a8fd6274343"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89b8cc948dce661af87527623b3a41cdd115e2f9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64467.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64467"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rust_binder: use a u64 stride when cleaning up the offsets array"
}