{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ba85c644ac8dc37d9b01a3332c2f142cb4d46954"
            },
            {
              "fixed": "f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95"
            },
            {
              "fixed": "79d95c02ae0a95e6e80e8e92b7ca74ecee02854f"
            },
            {
              "fixed": "3974ea1938406f9bfa7c1f48d4e43533f447bb08"
            }
          ],
          "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-2026-64520.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies\n\nThe register-based PARTITION_INFO_GET path trusted the firmware-provided\nindices when copying partition descriptors into the caller buffer.\nReject inconsistent counts or index progressions so the copy loop cannot\nwrite past the allocated array.\n\n(fixed cur_idx when exactly one descriptor in the first fragment)",
  "id": "CVE-2026-64520",
  "modified": "2026-08-12T03:51:10.988027601Z",
  "published": "2026-07-25T09:14:46.005Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3974ea1938406f9bfa7c1f48d4e43533f447bb08"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79d95c02ae0a95e6e80e8e92b7ca74ecee02854f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64520.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64520"
    },
    {
      "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:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies"
}