CVE-2025-21817

MediumCVSS 5.5/10Last modified Nov 5, 2026

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()

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-667

Affected software

VendorProductVersions
LinuxLinux>= 1645cd7fd42c236c952e9228badcac4fea1829ea, < a09280c39ea54080daf19cfaf4a3121a8d17d5cd; >= 8985da5481562e96b95e94ed8e5cc9b6565eb82b, < 2566ce907e5d5db8a039647208e029ce559baa31; >= c99f66e4084a62a2cc401c4704a84328aeddc9ec, < 7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c
LinuxLinux>= 6.12.96, < 6.12.109; >= 6.13.2, < 6.13.3

References

Timeline

Published
Feb 27, 2025
Last modified
Nov 5, 2026
NVD status
Modified

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CVE-2025-21817: Medium severity, CVSS 5.5 | Vulnix