CVE-2026-90192
kernel: mailbox: qcom-cpucp: handle NULL data in send_data callback
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 13, 2026
Description
A flaw was found in the Linux kernel's qcom-cpucp mailbox driver. The qcom_cpucp_mbox_send_data() function, responsible for sending data, did not properly handle a NULL data pointer when mailbox_clear_channel() attempted to notify the remote side that the receive (RX) channel was cleared. This blind dereferencing of a NULL pointer could lead to a kernel panic, effectively causing a Denial of Service (DoS) on the system.
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-476 · NULL Pointer Dereference