drm/panthor: reject firmware sections with oversized data

{
  "id": "6aea2cb70a53c61be49a14a405bdc9cd71b73b227206f62991ac6da5f9436b8c",
  "url": "https://osv.dev/vulnerability/CVE-2026-74452",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/panthor: reject firmware sections with oversized data",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/panthor: reject firmware sections with oversized data In panthor_fw_load_section_entry(), the data size to copy is calculated without validating it against the allocated section_size: section->data.size = hdr.data.end - hdr.data.start; If a crafted firmware sets data.size larger than the allocated memory, this could cause a heap buffer overflow in panthor_fw_init_section_mem() memcpy(section->mem->kmap, section->data.buf, section->data.size); Additionally, if the section->data.size exceeds the BO size, could this memset underflow the size calculation, leading to a massive out-of-bounds zeroing of kernel memory? memset(section->mem->kmap + section->data.size, 0, panthor_kernel_bo_size(section->mem) - section->data.size); Reject section entries whose initial data is larger than the section size.",
    "evidence": "osv:CVE-2026-74452",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.103",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.44",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-74452",
      "aliases": [
        "CVE-2026-74452"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/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": [
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                {
                  "fixed": "0e57165ca025a67d8dfd17efd2765fdd4925fdab"
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                {
                  "fixed": "2a761b9be5863e1d26a584f0c2d1e114a684ed9a"
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                {
                  "fixed": "7f4674d986c15c74327cb6ac6e2e2afecf061e04"
                },
                {
                  "fixed": "a3caaa06809248b996254be5b47e10804a3494e2"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74452.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.10.0"
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                {
                  "fixed": "6.12.103"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.13.0"
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                {
                  "fixed": "6.18.44"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.8"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74452.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.548762410Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0e57165ca025a67d8dfd17efd2765fdd4925fdab",
        "https://git.kernel.org/stable/c/2a761b9be5863e1d26a584f0c2d1e114a684ed9a",
        "https://git.kernel.org/stable/c/7f4674d986c15c74327cb6ac6e2e2afecf061e04",
        "https://git.kernel.org/stable/c/a3caaa06809248b996254be5b47e10804a3494e2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74452.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74452",
        "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/2026/74xxx/CVE-2026-74452.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74452",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519073,
  "published_at": "2026-08-15T12:26:56.331+00:00"
}