cve-2025-39681
Vulnerability from cvelistv5
Published
2025-09-05 17:20
Modified
2025-09-08 06:21
Severity ?
EPSS score ?
Summary
x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper
References
{
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"version": "5.8"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.10.242",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.190",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.149",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.103",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.44",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.16.4",
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},
{
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"status": "unaffected",
"version": "6.17-rc3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper\n\nSince\n\n 923f3a2b48bd (\"x86/resctrl: Query LLC monitoring properties once during boot\")\n\nresctrl_cpu_detect() has been moved from common CPU initialization code to\nthe vendor-specific BSP init helper, while Hygon didn\u0027t put that call in their\ncode.\n\nThis triggers a division by zero fault during early booting stage on our\nmachines with X86_FEATURE_CQM* supported, where get_rdt_mon_resources() tries\nto calculate mon_l3_config with uninitialized boot_cpu_data.x86_cache_occ_scale.\n\nAdd the missing resctrl_cpu_detect() in the Hygon BSP init helper.\n\n [ bp: Massage commit message. ]"
}
],
"providerMetadata": {
"dateUpdated": "2025-09-08T06:21:59.546Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432"
},
{
"url": "https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4"
},
{
"url": "https://git.kernel.org/stable/c/fb81222c1559f89bfe3aa1010f6d112531d55353"
},
{
"url": "https://git.kernel.org/stable/c/7207923d8453ebfb35667c1736169f2dd796772e"
},
{
"url": "https://git.kernel.org/stable/c/a9e5924daa954c9f585c1ca00358afe71d6781c4"
},
{
"url": "https://git.kernel.org/stable/c/d23264c257a70dbe021b43b3bc2ee16134cd2c69"
},
{
"url": "https://git.kernel.org/stable/c/d8df126349dad855cdfedd6bbf315bad2e901c2f"
}
],
"title": "x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper",
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"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2025-39681",
"datePublished": "2025-09-05T17:20:47.564Z",
"dateReserved": "2025-04-16T07:20:57.113Z",
"dateUpdated": "2025-09-08T06:21:59.546Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-39681\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-05T18:15:44.537\",\"lastModified\":\"2025-09-08T16:25:38.810\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nx86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper\\n\\nSince\\n\\n 923f3a2b48bd (\\\"x86/resctrl: Query LLC monitoring properties once during boot\\\")\\n\\nresctrl_cpu_detect() has been moved from common CPU initialization code to\\nthe vendor-specific BSP init helper, while Hygon didn\u0027t put that call in their\\ncode.\\n\\nThis triggers a division by zero fault during early booting stage on our\\nmachines with X86_FEATURE_CQM* supported, where get_rdt_mon_resources() tries\\nto calculate mon_l3_config with uninitialized boot_cpu_data.x86_cache_occ_scale.\\n\\nAdd the missing resctrl_cpu_detect() in the Hygon BSP init helper.\\n\\n [ bp: Massage commit message. ]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7207923d8453ebfb35667c1736169f2dd796772e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a9e5924daa954c9f585c1ca00358afe71d6781c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d23264c257a70dbe021b43b3bc2ee16134cd2c69\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d8df126349dad855cdfedd6bbf315bad2e901c2f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fb81222c1559f89bfe3aa1010f6d112531d55353\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.