CVE-2025-39870

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Source
https://cve.org/CVERecord?id=CVE-2025-39870
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39870.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-39870
Downstream
Related
Published
2025-09-23T06:00:44.369Z
Modified
2026-03-12T02:16:48.642185Z
Summary
dmaengine: idxd: Fix double free in idxd_setup_wqs()
Details

In the Linux kernel, the following vulnerability has been resolved:

dmaengine: idxd: Fix double free in idxdsetupwqs()

The clean up in idxdsetupwqs() 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->maxwqs" is <= 0 then we call putdevice(confdev) when "confdev" hasn't been initialized. 2) If kzallocnode() fails then again "confdev" 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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39870.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
d584acdf54f409cb7eae1359ae6c12aaabedeed8
Fixed
25e6146c2812487a88f619d5ff6efbdcd5b2bc31
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
47846211998a9ffb0fcc08092eb95ac783d2b11a
Fixed
df82c7901513fd0fc738052a8e6a330d92cc8ec9
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
5fcd392dae6d6aba7dc64ffdbb838ff191315da3
Fixed
ec5430d090d0b6ace8fefa290fc37e88930017d2
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4
Fixed
9f0e225635475b2285b966271d5e82cba74295b1
Fixed
39aaa337449e71a41d4813be0226a722827ba606
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
ed2c66000aa64c0d2621864831f0d04c820a1441

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-39870.json"