CVE-2026-93083
kernel: firmware: arm_scmi: Unwind TX receiver mailbox setup failure
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 29, 2026
Description
A flaw was found in the arm_scmi firmware component of the Linux kernel. When the mailbox_chan_setup() function attempts to set up a unidirectional transmit (TX) receiver channel, it may fail to properly release the primary channel if the secondary channel request fails. This resource leak can leave the primary mailbox channel allocated and busy, potentially causing probe deferral or other setup failures, which could lead to a denial of service for affected system operations.
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-772 · Missing Release of Resource after Effective Lifetime