CVE-2025-39870 (GCVE-0-2025-39870)

Vulnerability from cvelistv5 – Published: 2025-09-23 06:00 – Updated: 2025-11-03 17:44
VLAI?
Title
dmaengine: idxd: Fix double free in idxd_setup_wqs()
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d584acdf54f409cb7eae1359ae6c12aaabedeed8 , < 25e6146c2812487a88f619d5ff6efbdcd5b2bc31 (git)
Affected: 47846211998a9ffb0fcc08092eb95ac783d2b11a , < df82c7901513fd0fc738052a8e6a330d92cc8ec9 (git)
Affected: 5fcd392dae6d6aba7dc64ffdbb838ff191315da3 , < ec5430d090d0b6ace8fefa290fc37e88930017d2 (git)
Affected: 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4 , < 9f0e225635475b2285b966271d5e82cba74295b1 (git)
Affected: 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4 , < 39aaa337449e71a41d4813be0226a722827ba606 (git)
Affected: ed2c66000aa64c0d2621864831f0d04c820a1441 (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.1.153 , ≤ 6.1.* (semver)
Unaffected: 6.6.107 , ≤ 6.6.* (semver)
Unaffected: 6.12.48 , ≤ 6.12.* (semver)
Unaffected: 6.16.8 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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