CVE-2025-21817

block: mark GFP_NOIO around sysfs ->store()

MEDIUM

5.5

CVSS Score

Published: February 27, 2025 at 08:04 PM UTC

Updated: September 7, 2026 at 05:41 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

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()

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

6.12.96 ≤ v < 6.12.1096.13.2 ≤ v < 6.13.31645cd7fd42c236c952e9228badcac4fea1829ea6.12.96 6.13.28985da5481562e96b95e94ed8e5cc9b6565eb82bc99f66e4084a62a2cc401c4704a84328aeddc9ec

Vendor states this is fixed in 2566ce907e5d5db8a039647208e029ce559baa31 (fixed)

Vendor states this is fixed in 7c0be4ead1f8f5f8be0803f347de0de81e3b8e1c (fixed)

Vendor states this is fixed in a09280c39ea54080daf19cfaf4a3121a8d17d5cd (fixed)

Affected range stops below 6.12.109, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.13.3, so it looks safe — our inference, not a vendor statement