High 7.8Published Sep 23, 2025

CVE-2025-39870dmaengine: idxd: Fix double free in idxd_setup_wqs()

Updated under an hour ago (Oct 27, 2026, 1:20 AM ET)

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It affects Linux and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from d584acdf54f409cb7eae1359ae6c12aaabedeed8 before 25e6146c2812487a88f619d5ff6efbdcd5b2bc31; from 47846211998a9ffb0fcc08092eb95ac783d2b11a before df82c7901513fd0fc738052a8e6a330d92cc8ec9; from 5fcd392dae6d6aba7dc64ffdbb838ff191315da3 before ec5430d090d0b6ace8fefa290fc37e88930017d2; from 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4 before 9f0e225635475b2285b966271d5e82cba74295b1; from 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4 before 39aaa337449e71a41d4813be0226a722827ba606; ed2c66000aa64c0d2621864831f0d04c820a1441; from 6.1.140 before 6.1.153; from 6.6.92 before 6.6.107; and 2 more ranges	CNA record
linux linux_kernel linux:linux_kernel	from 6.1.140 before 6.1.153; from 6.6.92 before 6.6.107; from 6.12.30 before 6.12.48; from 6.14.8 before 6.15; from 6.15.1 before 6.16.8; 6.15; 6.15; 6.17; and 4 more ranges	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/25e6146c2812487a88f619d5ff6efbdcd5b2bc31	patch
https://git.kernel.org/stable/c/df82c7901513fd0fc738052a8e6a330d92cc8ec9	patch
https://git.kernel.org/stable/c/ec5430d090d0b6ace8fefa290fc37e88930017d2	patch
https://git.kernel.org/stable/c/9f0e225635475b2285b966271d5e82cba74295b1	patch
https://git.kernel.org/stable/c/39aaa337449e71a41d4813be0226a722827ba606	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.