CVE-2025-39870

Advisory lineage Upstream: 0 Downstream: 29
Analyzed
Published: 23 Sept 2025, 06:00
Last modified:23 May 2026, 16:00

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

23 Sept 2025, 06:00
Published
Vulnerability first disclosed
23 May 2026, 16:00
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 6%

Techniques & Countermeasures

  • CWE-415•Double Free

    The product calls free() twice on the same memory address.

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ d584acdf54f409cb7eae1359ae6c12aaabedeed8, < 25e6146c2812487a88f619d5ff6efbdcd5b2bc31 | ≥ 47846211998a9ffb0fcc08092eb95ac783d2b11a, < df82c7901513fd0fc738052a8e6a330d92cc8ec9 | ≥ 5fcd392dae6d6aba7dc64ffdbb838ff191315da3, < ec5430d090d0b6ace8fefa290fc37e88930017d2 | ≥ 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4, < 9f0e225635475b2285b966271d5e82cba74295b1 | ≥ 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4, < 39aaa337449e71a41d4813be0226a722827ba606 | ed2c66000aa64c0d2621864831f0d04c820a1441 | ≥ 6.1.140, < 6.1.153 | ≥ 6.6.92, < 6.6.107 | ≥ 6.12.30, < 6.12.48 | ≥ 6.14.8, < 6.15 | 6.15

  • linux•linux_kernel

    ≥ 6.1.140, < 6.1.153 | ≥ 6.6.92, < 6.6.107 | ≥ 6.12.30, < 6.12.48 | ≥ 6.14.8, < 6.15 | ≥ 6.15.1, < 6.16.8 | 6.15 | 6.15:rc7 | 6.17:rc1 | 6.17:rc2 | 6.17:rc3 | 6.17:rc4 | 6.17:rc5

References (6)