PT-2025-39128 · Linux+5 · Linux Kernel+5
Published
2025-07-29
·
Updated
2026-05-07
·
CVE-2025-39871
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains an issue within the dmaengine subsystem, specifically related to the idxd driver. A duplicate call to
put device() within the idxd free() function can lead to a reference count underflow, potentially resulting in a use-after-free condition. This occurs because idxd unregister devices() already handles releasing the device reference through device unregister() and put device(). When CONFIG DEBUG KOBJECT RELEASE is enabled, asynchronous cleanup triggered by put device() can exacerbate the issue, leading to memory corruption during module unloading. The improper idxd free() call is the root cause of the problem.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Related Identifiers
Affected Products
Astra Linux
Debian
Linuxmint
Linux Kernel
Suse
Ubuntu