FKIE_CVE-2025-39990
Vulnerability from fkie_nvd - Published: 2025-10-15 08:15 - Updated: 2026-10-21 13:18
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
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"kernel/bpf/core.c",
"kernel/bpf/verifier.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "dfbff47f120e4b0793ca0e0b8660361ccac25a74",
"status": "affected",
"version": "f470378c7562a2818b45ed11c98973f2b89eedd3",
"versionType": "git"
},
{
"lessThan": "3d429cb1278e995e22995ef117fa96d223a67e93",
"status": "affected",
"version": "f470378c7562a2818b45ed11c98973f2b89eedd3",
"versionType": "git"
},
{
"lessThan": "6233715b4b714068d6c831d214a4e8792109875a",
"status": "affected",
"version": "f470378c7562a2818b45ed11c98973f2b89eedd3",
"versionType": "git"
},
{
"lessThan": "e4414b01c1cd9887bbde92f946c1ba94e40d6d64",
"status": "affected",
"version": "f470378c7562a2818b45ed11c98973f2b89eedd3",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"kernel/bpf/core.c",
"kernel/bpf/verifier.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.8"
},
{
"lessThan": "5.8",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.50",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"version": "6.16.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"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"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbpf: Verificar que la funci\u00f3n auxiliar sea v\u00e1lida en get_helper_proto\n\nEl robot de prueba del kernel inform\u00f3 un error del verificador [1] donde el puntero de la funci\u00f3n auxiliar podr\u00eda ser NULL debido a una opci\u00f3n de configuraci\u00f3n deshabilitada.\n\nComo sugiri\u00f3 Alexei, podr\u00edamos verificar eso directamente en get_helper_proto. Marcando la funci\u00f3n auxiliar tail_call con BPF_PTR_POISON, porque no se utiliza por dise\u00f1o.\n\n [1] https://lore.kernel.org/oe-lkp/202507160818.68358831-lkp@intel.com"
}
],
"id": "CVE-2025-39990",
"lastModified": "2026-10-21T13:18:18.020",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-39990",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-15T21:55:55.410522Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-10-15T08:15:37.060",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3d429cb1278e995e22995ef117fa96d223a67e93"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/6233715b4b714068d6c831d214a4e8792109875a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/dfbff47f120e4b0793ca0e0b8660361ccac25a74"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e4414b01c1cd9887bbde92f946c1ba94e40d6d64"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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