GHSA-9HM8-83J2-JCQX

Vulnerability from github – Published: 2026-01-13 18:31 – Updated: 2026-01-13 18:31
VLAI?
Details

In the Linux kernel, the following vulnerability has been resolved:

media: vidtv: initialize local pointers upon transfer of memory ownership

vidtv_channel_si_init() creates a temporary list (program, service, event) and ownership of the memory itself is transferred to the PAT/SDT/EIT tables through vidtv_psi_pat_program_assign(), vidtv_psi_sdt_service_assign(), vidtv_psi_eit_event_assign().

The problem here is that the local pointer where the memory ownership transfer was completed is not initialized to NULL. This causes the vidtv_psi_pmt_create_sec_for_each_pat_entry() function to fail, and in the flow that jumps to free_eit, the memory that was freed by vidtv_psi_table_destroy() can be accessed again by vidtv_psi_event_destroy() due to the uninitialized local pointer, so it is freed once again.

Therefore, to prevent use-after-free and double-free vulnerability, local pointers must be initialized to NULL when transferring memory ownership.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-68808"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-13T16:16:02Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: vidtv: initialize local pointers upon transfer of memory ownership\n\nvidtv_channel_si_init() creates a temporary list (program, service, event)\nand ownership of the memory itself is transferred to the PAT/SDT/EIT\ntables through vidtv_psi_pat_program_assign(),\nvidtv_psi_sdt_service_assign(), vidtv_psi_eit_event_assign().\n\nThe problem here is that the local pointer where the memory ownership\ntransfer was completed is not initialized to NULL. This causes the\nvidtv_psi_pmt_create_sec_for_each_pat_entry() function to fail, and\nin the flow that jumps to free_eit, the memory that was freed by\nvidtv_psi_*_table_destroy() can be accessed again by\nvidtv_psi_*_event_destroy() due to the uninitialized local pointer, so it\nis freed once again.\n\nTherefore, to prevent use-after-free and double-free vulnerability,\nlocal pointers must be initialized to NULL when transferring memory\nownership.",
  "id": "GHSA-9hm8-83j2-jcqx",
  "modified": "2026-01-13T18:31:04Z",
  "published": "2026-01-13T18:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68808"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30f4d4e5224a9e44e9ceb3956489462319d804ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3caa18d35f1dabe85a3dd31bc387f391ac9f9b4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98aabfe2d79f74613abc2b0b1cef08f97eaf5322"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a69c7fd603bf5ad93177394fbd9711922ee81032"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb9bd6d8d314b748e946ed6555eb4a956ee8c4d8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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