CVE-2025-40146
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-12

Last updated on: 2025-11-12

Assigner: kernel.org

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]/
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-11-12
Last Modified
2025-11-12
Generated
2026-06-16
AI Q&A
2025-11-13
EPSS Evaluated
2026-06-15
NVD
CVE-2025-40146
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability in the Linux kernel's blk-mq subsystem involves a potential deadlock situation when the number of requests (nr_requests) grows. Specifically, allocating and freeing sched_tags while the queue is frozen can cause a deadlock. The fix involves allocating memory before freezing the queue and freeing it after the queue is unfrozen to avoid this deadlock.

Impact Analysis

This vulnerability can cause the Linux kernel's block multi-queue (blk-mq) system to deadlock, potentially leading to system hangs or degraded performance when handling I/O requests. This can impact system stability and availability.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2025-40146. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart