PT-2026-2872 · Linux+2 · Linux Kernel+2
Published
2025-01-01
·
Updated
2026-05-11
·
CVE-2025-71111
CVSS v3.1
4.7
Medium
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the Linux kernel due to the repeated evaluation of arguments within the
FAN FROM REG macro. This can lead to divide-by-zero errors when used in lockless contexts with shared driver data. The issue is addressed by converting the macro to a static function, ensuring arguments are evaluated only once. Additionally, the calculation within store fan div is moved inside the update lock to maintain data consistency during read-modify-write operations. The fix adheres to minimal changes, focusing only on macros that evaluate arguments multiple times in lockless contexts.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Time Of Check To Time Of Use
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu