{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-31405",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-31405"
  ],
  "published": "2026-04-06T07:33:15Z",
  "summary": "media: dvb-net: fix OOB access in ULE extension header tables",
  "details": "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 & 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.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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    {
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      "url": "https://www.cve.org/CVERecord?id=CVE-2026-31405"
    },
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      "url": "https://git.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629"
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    "upstream_modified": "2026-08-05T13:16:28Z",
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      "cvss_v3_score": 9.8,
      "cvss_v3_severity": "Critical",
      "scenario": "AV:N - Malformed DVB ULE SNDUs can be delivered as received network/transport-stream data to a configured DVB network interface. In the highest reasonable deployment, an attacker controlling or injecting into the DVB/IP broadcast feed can reach the vulnerable parser remotely without local device access.\nAC:L - The attacker only needs to craft a valid ULE SNDU with htype 255 and a correct CRC on the selected PID. There is no race or condition outside attacker control once the victim is receiving the ULE feed.\nPR:N - Creating the DVB network interface is CAP_SYS_ADMIN-gated on the victim, but exploitation occurs through inbound transport-stream data after setup. The sender of the malicious ULE packet needs no privileges on the victim system.\nUI:N - No victim action is required to process the malicious SNDU once the DVB network interface is active and receiving. Packet handling occurs asynchronously in the demux receive callback.\nS:U - The vulnerable code executes in the kernel and impacts the same operating-system security authority. There is no VM, IOMMU, or separate sandbox boundary crossed.\nC:H - The bug performs an out-of-bounds read from a kernel function-pointer table and may invoke the resulting pointer in kernel context. Treating the possible control-flow hijack at the higher severity, successful exploitation can expose kernel memory.\nI:H - The out-of-bounds table value may be called as a function pointer, creating a potential kernel control-flow hijack. Under the higher-severity rule, this is scored as potential kernel code execution and arbitrary modification.\nA:H - An invalid or unintended function-pointer call in kernel context can directly trigger an oops or panic. The malicious packet can be sent repeatedly to sustain denial of service."
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}