fkie_cve-2025-38704
Vulnerability from fkie_nvd
Published
2025-09-04 16:15
Modified
2025-11-24 19:50
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
rcu/nocb: Fix possible invalid rdp's->nocb_cb_kthread pointer access
In the preparation stage of CPU online, if the corresponding
the rdp's->nocb_cb_kthread does not exist, will be created,
there is a situation where the rdp's rcuop kthreads creation fails,
and then de-offload this CPU's rdp, does not assign this CPU's
rdp->nocb_cb_kthread pointer, but this rdp's->nocb_gp_rdp and
rdp's->rdp_gp->nocb_gp_kthread is still valid.
This will cause the subsequent re-offload operation of this offline
CPU, which will pass the conditional check and the kthread_unpark()
will access invalid rdp's->nocb_cb_kthread pointer.
This commit therefore use rdp's->nocb_gp_kthread instead of
rdp_gp's->nocb_gp_kthread for safety check.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
"configurations": [
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"nodes": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1936DB45-ECC5-4A1A-A924-0D4E14DFE578",
"versionEndExcluding": "6.12.43",
"vulnerable": true
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu/nocb: Fix possible invalid rdp\u0027s-\u003enocb_cb_kthread pointer access\n\nIn the preparation stage of CPU online, if the corresponding\nthe rdp\u0027s-\u003enocb_cb_kthread does not exist, will be created,\nthere is a situation where the rdp\u0027s rcuop kthreads creation fails,\nand then de-offload this CPU\u0027s rdp, does not assign this CPU\u0027s\nrdp-\u003enocb_cb_kthread pointer, but this rdp\u0027s-\u003enocb_gp_rdp and\nrdp\u0027s-\u003erdp_gp-\u003enocb_gp_kthread is still valid.\n\nThis will cause the subsequent re-offload operation of this offline\nCPU, which will pass the conditional check and the kthread_unpark()\nwill access invalid rdp\u0027s-\u003enocb_cb_kthread pointer.\n\nThis commit therefore use rdp\u0027s-\u003enocb_gp_kthread instead of\nrdp_gp\u0027s-\u003enocb_gp_kthread for safety check."
}
],
"id": "CVE-2025-38704",
"lastModified": "2025-11-24T19:50:25.427",
"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": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2025-09-04T16:15:39.263",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
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"url": "https://git.kernel.org/stable/c/1bba3900ca18bdae28d1b9fa10f16a8f8cb2ada1"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
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"description": [
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"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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.
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