In the Linux kernel, the following vulnerability has been resolved:
md: wake raid456 reshape waiters before suspend
During raid456 reshape, direct IO across the reshape position can sleep
in raid5_make_request() waiting for reshape progress while still
holding an active_io reference. If userspace then freezes reshape and
writes md/suspend_lo or md/suspend_hi, mddev_suspend() kills active_io
and waits for all in-flight IO to drain.
This can deadlock: the IO needs reshape progress to continue, but the
reshape thread is already frozen, so the active_io reference is never
dropped and suspend never completes.
raid5_prepare_suspend() already wakes wait_for_reshape for dm-raid. Do
the same for normal md suspend when reshape is already interrupted, so
waiting raid456 IO can abort, drop its reference, and let suspend
finish.
The mdadm test tests/25raid456-reshape-deadlock reproduces the hang.
References
Configurations
Configuration 1 (hide)
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History
23 Jul 2026, 20:53
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/8ae3e14d7f3df58f7f49c02d74344e3dcd5f84f0 - Patch | |
| References | () https://git.kernel.org/stable/c/8b6a72420821e6da2cab6a69d5233500d2698b93 - Patch | |
| References | () https://git.kernel.org/stable/c/cf86bb53b9c92354904a328e947a05ffbfdd1840 - Patch | |
| References | () https://git.kernel.org/stable/c/ff6b93410192b812d73cc54062529715b2dc849f - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | NVD-CWE-noinfo |
24 Jun 2026, 17:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-24 17:17
Updated : 2026-07-23 20:53
NVD link : CVE-2026-53123
Mitre link : CVE-2026-53123
CVE.ORG link : CVE-2026-53123
JSON object : View
Products Affected
linux
- linux_kernel
CWE