CVE-2026-93092
kernel: firmware: arm_scmi: Unregister device notifier before IDR teardown
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 arm_scmi firmware component of the Linux kernel. A race condition can occur during the unregistration of device notifiers and the teardown of the active_protocols IDR (ID allocator). This timing issue could potentially lead to system instability or a denial of service (DoS) due to improper memory handling during the removal process.
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-367 · Time-of-check Time-of-use (TOCTOU) Race Condition