fkie_cve-2025-39870
Vulnerability from fkie_nvd
Published
2025-09-23 06:15
Modified
2025-09-24 18:11
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
dmaengine: idxd: Fix double free in idxd_setup_wqs()
The clean up in idxd_setup_wqs() has had a couple bugs because the error
handling is a bit subtle. It's simpler to just re-write it in a cleaner
way. The issues here are:
1) If "idxd->max_wqs" is <= 0 then we call put_device(conf_dev) when
"conf_dev" hasn't been initialized.
2) If kzalloc_node() fails then again "conf_dev" is invalid. It's
either uninitialized or it points to the "conf_dev" from the
previous iteration so it leads to a double free.
It's better to free partial loop iterations within the loop and then
the unwinding at the end can handle whole loop iterations. I also
renamed the labels to describe what the goto does and not where the goto
was located.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: idxd: Fix double free in idxd_setup_wqs()\n\nThe clean up in idxd_setup_wqs() has had a couple bugs because the error\nhandling is a bit subtle. It\u0027s simpler to just re-write it in a cleaner\nway. The issues here are:\n\n1) If \"idxd-\u003emax_wqs\" is \u003c= 0 then we call put_device(conf_dev) when\n \"conf_dev\" hasn\u0027t been initialized.\n2) If kzalloc_node() fails then again \"conf_dev\" is invalid. It\u0027s\n either uninitialized or it points to the \"conf_dev\" from the\n previous iteration so it leads to a double free.\n\nIt\u0027s better to free partial loop iterations within the loop and then\nthe unwinding at the end can handle whole loop iterations. I also\nrenamed the labels to describe what the goto does and not where the goto\nwas located."
}
],
"id": "CVE-2025-39870",
"lastModified": "2025-09-24T18:11:24.520",
"metrics": {},
"published": "2025-09-23T06:15:46.240",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/25e6146c2812487a88f619d5ff6efbdcd5b2bc31"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/39aaa337449e71a41d4813be0226a722827ba606"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/9f0e225635475b2285b966271d5e82cba74295b1"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/df82c7901513fd0fc738052a8e6a330d92cc8ec9"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ec5430d090d0b6ace8fefa290fc37e88930017d2"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
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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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