CVE-2026-93082
kernel: firmware: arm_scmi: Unwind P2A 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 Linux kernel's arm_scmi firmware. When the mailbox_chan_setup() function attempts to acquire an additional P2A receiver channel after successfully acquiring the primary channel, a failure in the subsequent request can leave the primary channel allocated. This resource management issue prevents the primary channel from being properly released, potentially leading to probe deferral or other system setup failures, which could result in 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-772 · Missing Release of Resource after Effective Lifetime