CVE-2025-40146 Details
Description
In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix potential deadlock while nr_requests grown Allocate and free sched_tags while queue is freezed can deadlock[1], this is a long term problem, hence allocate memory before freezing queue and free memory after queue is unfreezed. [1] https://lore.kernel.org/all/[email protected]/
A vulnerability in the Linux kernel's block multi-queue (blk-mq) subsystem could lead to a deadlock situation. This issue arises when the number of requests (nr_requests) is increased while the request queue is frozen, causing a conflict when allocating and freeing scheduler tags. The problem has been addressed by modifying the memory allocation process to occur before the queue is frozen and the deallocation to take place after it is unfrozen.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed. Instructions for downloading the patched version are available on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Nov 12, 2025References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/8d26acf8477174d8ef690eb6affe13a630f586ae | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/b86433721f46d934940528f28d49c1dedb690df1 | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Nov 12, 2025 | New CVE Received | kernel.org |
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