CVE-2025-39990 (GCVE-0-2025-39990)
Vulnerability from cvelistv5
Published
2025-10-15 07:56
Modified
2025-10-15 07:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Check the helper function is valid in get_helper_proto kernel test robot reported verifier bug [1] where the helper func pointer could be NULL due to disabled config option. As Alexei suggested we could check on that in get_helper_proto directly. Marking tail_call helper func with BPF_PTR_POISON, because it is unused by design. [1] https://lore.kernel.org/oe-lkp/202507160818.68358831-lkp@intel.com
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d429cb1278e995e22995ef117fa96d223a67e93
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6233715b4b714068d6c831d214a4e8792109875a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4414b01c1cd9887bbde92f946c1ba94e40d6d64
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
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          "programFiles": [
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              "operator": "OR"
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      "descriptions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check the helper function is valid in get_helper_proto\n\nkernel test robot reported verifier bug [1] where the helper func\npointer could be NULL due to disabled config option.\n\nAs Alexei suggested we could check on that in get_helper_proto\ndirectly. Marking tail_call helper func with BPF_PTR_POISON,\nbecause it is unused by design.\n\n  [1] https://lore.kernel.org/oe-lkp/202507160818.68358831-lkp@intel.com"
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      "providerMetadata": {
        "dateUpdated": "2025-10-15T07:56:07.295Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "bpf: Check the helper function is valid in get_helper_proto",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39990",
    "datePublished": "2025-10-15T07:56:07.295Z",
    "dateReserved": "2025-04-16T07:20:57.150Z",
    "dateUpdated": "2025-10-15T07:56:07.295Z",
    "state": "PUBLISHED"
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  }
}


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