CVE-2026-53123
kernel: md: wake raid456 reshape waiters before suspend
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 24, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's Multiple Device (MD) driver, specifically within the raid456 reshape functionality. A local user could trigger a deadlock by freezing the reshape process and writing to the md/suspend_lo or md/suspend_hi files while direct I/O operations are in progress. This condition prevents the system from completing the suspend operation, leading to a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-833 · Deadlock