CVE-2026-93086
kernel: firmware: arm_scmi: Avoid IDR updates while cleaning channels
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's arm_scmi firmware component. During the cleanup of transmit and receive channels, the scmi_cleanup_channels() function performs an unsafe operation by removing entries from a kernel data structure (IDR) while it is being iterated. This can lead to an invalid iterator state, potentially causing the kernel to crash and resulting in a denial of service.
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-663 · Use of a Non-reentrant Function in a Concurrent Context