FKIE_CVE-2026-64520

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-07-27 05:16
Severity
8.4 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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)
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3974ea1938406f9bfa7c1f48d4e43533f447bb08
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/79d95c02ae0a95e6e80e8e92b7ca74ecee02854f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/arm_ffa/driver.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95",
              "status": "affected",
              "version": "ba85c644ac8dc37d9b01a3332c2f142cb4d46954",
              "versionType": "git"
            },
            {
              "lessThan": "79d95c02ae0a95e6e80e8e92b7ca74ecee02854f",
              "status": "affected",
              "version": "ba85c644ac8dc37d9b01a3332c2f142cb4d46954",
              "versionType": "git"
            },
            {
              "lessThan": "3974ea1938406f9bfa7c1f48d4e43533f447bb08",
              "status": "affected",
              "version": "ba85c644ac8dc37d9b01a3332c2f142cb4d46954",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/firmware/arm_ffa/driver.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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",
  "lastModified": "2026-07-27T05:16:56.093",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-07-25T10:17:38.290",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3974ea1938406f9bfa7c1f48d4e43533f447bb08"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/79d95c02ae0a95e6e80e8e92b7ca74ecee02854f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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