FKIE_CVE-2026-31405

Vulnerability from fkie_nvd - Published: 2026-04-06 08:16 - Updated: 2026-04-07 13:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: media: dvb-net: fix OOB access in ULE extension header tables The ule_mandatory_ext_handlers[] and ule_optional_ext_handlers[] tables in handle_one_ule_extension() are declared with 255 elements (valid indices 0-254), but the index htype is derived from network-controlled data as (ule_sndu_type & 0x00FF), giving a range of 0-255. When htype equals 255, an out-of-bounds read occurs on the function pointer table, and the OOB value may be called as a function pointer. Add a bounds check on htype against the array size before either table is accessed. Out-of-range values now cause the SNDU to be discarded.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-net: fix OOB access in ULE extension header tables\n\nThe ule_mandatory_ext_handlers[] and ule_optional_ext_handlers[] tables\nin handle_one_ule_extension() are declared with 255 elements (valid\nindices 0-254), but the index htype is derived from network-controlled\ndata as (ule_sndu_type \u0026 0x00FF), giving a range of 0-255. When\nhtype equals 255, an out-of-bounds read occurs on the function pointer\ntable, and the OOB value may be called as a function pointer.\n\nAdd a bounds check on htype against the array size before either table\nis accessed. Out-of-range values now cause the SNDU to be discarded."
    }
  ],
  "id": "CVE-2026-31405",
  "lastModified": "2026-04-07T13:20:35.010",
  "metrics": {},
  "published": "2026-04-06T08:16:38.253",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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