firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies

{
  "id": "0fae885d4c736e56af77cdfd679c84cba8459ed0f17d3106c3b3393d8531afc2",
  "url": "https://osv.dev/vulnerability/CVE-2026-64520",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies The register-based PARTITION_INFO_GET path trusted the firmware-provided indices when copying partition descriptors into the caller buffer. Reject inconsistent counts or index progressions so the copy loop cannot write past the allocated array. (fixed cur_idx when exactly one descriptor in the first fragment)",
    "evidence": "osv:CVE-2026-64520",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.34",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.11",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-64520",
      "aliases": [
        "CVE-2026-64520"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ba85c644ac8dc37d9b01a3332c2f142cb4d46954"
                },
                {
                  "fixed": "f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95"
                },
                {
                  "fixed": "79d95c02ae0a95e6e80e8e92b7ca74ecee02854f"
                },
                {
                  "fixed": "3974ea1938406f9bfa7c1f48d4e43533f447bb08"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64520.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.12.0"
                },
                {
                  "fixed": "6.18.34"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.11"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64520.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.504152646Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3974ea1938406f9bfa7c1f48d4e43533f447bb08",
        "https://git.kernel.org/stable/c/79d95c02ae0a95e6e80e8e92b7ca74ecee02854f",
        "https://git.kernel.org/stable/c/f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64520.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64520",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64520.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64520",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 520385,
  "published_at": "2026-07-25T09:14:46.005+00:00"
}