CVE-2026-93057
kernel: scsi: ufs: core: Avoid possible memory reclaim deadlock in TX EQTR context
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 20, 2026
Description
A flaw was found in the Linux kernel. When the Universal Flash Storage (UFS) tagset is quiesced during devfreq gear scaling, the Transmit Event Queue Tail Register (TX EQTR) can attempt memory allocations. If direct memory reclaim is triggered in this state, it can lead to a deadlock because I/O operations to the UFS device are required for reclaim/writeback, but the queue is quiesced. This can result in a system hang, causing 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