CVE-2025-21817

MEDIUM

Linux Kernel - Denial of Service via sysfs Store Callback Deadlock

Title source: llm

Description

In the Linux kernel, the following vulnerability has been resolved: block: mark GFP_NOIO around sysfs ->store() sysfs ->store is called with queue freezed, meantime we have several ->store() callbacks(update_nr_requests, wbt, scheduler) to allocate memory with GFP_KERNEL which may run into direct reclaim code path, then potential deadlock can be caused. Fix the issue by marking NOIO around sysfs ->store()

References (2)

Core 2

Core References

Patch

https://git.kernel.org/stable/c/2566ce907e5d5db8a039647208e029ce559baa31

Patch

https://git.kernel.org/stable/c/7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c

Scores

CVSS v3 5.5

EPSS 0.0012

EPSS Percentile 1.9%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-667

Status published

Products (5)

linux/Kernel 6.13.2 - 6.13.3linux

Linux/Linux 6.13.2 - 6.13.3

Linux/Linux 8985da5481562e96b95e94ed8e5cc9b6565eb82b - 2566ce907e5d5db8a039647208e029ce559baa31

Linux/Linux c99f66e4084a62a2cc401c4704a84328aeddc9ec - 7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c

linux/linux_kernel 6.13.2

Published Feb 27, 2025

Tracked Since Feb 18, 2026