CVE-2025-71225

MEDIUM EPSS 0.4%
Published Feb 18, 20264mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 3.1
Medium
Find Similar
Published Feb 18, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: md: suspend array while updating raid_disks via sysfs In raid1_reshape(), freeze_array() is called before modifying the r1bio memory pool (conf->r1bio_pool) and conf->raid_disks, and unfreeze_array() is called after the update is completed. However, freeze_array() only waits until nr_sync_pending and (nr_pending - nr_queued) of all buckets reaches zero. When an I/O error occurs, nr_queued is increased and the corresponding r1bio is queued to either retry_list or bio_end_io_list. As a result, freeze_array() may unblock before these r1bios are released. This can lead to a situation where conf->raid_disks and the mempool have already been updated while queued r1bios, allocated with the old raid_disks value, are later released. Consequently, free_r1bio() may access memory out of bounds in put_all_bios() and release r1bios of the wrong size to the new mempool, potentially causing issues with the mempool as well. Since only normal I/O might increase nr_queued while an I/O error occurs, suspending the array avoids this issue. Note: Updating raid_disks via ioctl SET_ARRAY_INFO already suspends the array. Therefore, we suspend the array when updating raid_disks via sysfs to avoid this issue too.

CVSS Details

Base Score
5.3
Exploitability
1.0
Impact
4.2
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
0.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-367

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥3.4.59  –  <3.5
linuxlinux_kernel*≥3.9.7  –  <3.10
linuxlinux_kernel*≥3.10.1  –  <6.12.70
linuxlinux_kernel*≥6.13  –  <6.18.10
linuxlinux_kernel3.10any
linuxlinux_kernel3.10any
linuxlinux_kernel3.10any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any

References 3

  • git.kernel.org https://git.kernel.org/stable/c/0107b18cd8ac17eb3e54786adc05a85cdbb6ef22
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/165d1359f945b72c5f90088f60d48ff46115269e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2cc583653bbe050bacd1cadcc9776d39bf449740
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0107b18cd8ac17eb3e54786adc05a85cdbb6ef22
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/165d1359f945b72c5f90088f60d48ff46115269e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2cc583653bbe050bacd1cadcc9776d39bf449740
    Patch