media: dvb-net: fix OOB access in ULE extension header tables_CVE-2026-31405

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-04-06T07:33:00.544Z",
    "modified": "2026-04-27T14:02:52.534Z",
    "type": "cve",
    "title": "media: dvb-net: fix OOB access in ULE extension header tables",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/e51238718217c4abdb3ccc3b0c0cde265c7ec629\nhttps://git.kernel.org/stable/c/b2bd2ee73b697c177157bba534e1b1064c2e66a0\nhttps://git.kernel.org/stable/c/29ef43ceb121d67b87f4cbb08439e4e9e732eff8\nhttps://git.kernel.org/stable/c/1a6da3dbb9985d00743073a1cc1f96e59f5abc30\nhttps://git.kernel.org/stable/c/145e50c2c700fa52b840df7bab206043997dd18e\nhttps://git.kernel.org/stable/c/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe\nhttps://git.kernel.org/stable/c/f2b65dcb78c8990e4c68a906627433be1fe38a92\nhttps://git.kernel.org/stable/c/24d87712727a5017ad142d63940589a36cd25647",
    "id": "CVE-2026-31405",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 2.6.12",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "confidentialityImpact": "",
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        "cvssV3": {
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
    "vendor": "Linux",
    "ai_description": "",
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    "ai_score": 0
}