PT-2025-42241 · Linux+3 · Linux Kernel+3
Published
2025-10-15
·
Updated
2026-03-13
·
CVE-2025-39966
CVSS v3.1
7.0
High
| Vector | AV:L/AC:H/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 contained a use-after-free issue within the iommufd subsystem, specifically during the abort process for file descriptors. The problem stemmed from the asynchronous nature of
fput(), which doesn't immediately call the file's release operation. This delay created a race condition where an iommufd object could be freed prematurely while the file structure still held a reference to it, leading to a use-after-free condition when the workqueue completed the fput() operation. The issue was triggered when allocation of a new object aborted before the file was fully installed. The vulnerability was identified through KASAN reports during testing.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Race Condition
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Weakness Enumeration
Related Identifiers
Affected Products
Almalinux
Linux Kernel
Red Hat
Rocky Linux