CVE-2026-90192

Summary

In the Linux kernel, the following vulnerability has been resolved:

mailbox: qcom-cpucp: handle NULL data in send_data callback

mailbox_clear_channel() calls mbox_send_message() with NULL data to notify the remote side that the RX channel has been cleared. qcom_cpucp_mbox_send_data() blindly dereferenced the data pointer, causing a NULL pointer dereference kernel panic when invoked from this path under PREEMPT_RT.

Add an explicit NULL check and return early without writing to the TX register, which is the correct behaviour for a channel-clear notification.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0e2a9a03106cd5fa0dbc9047675e7645c55e2669 < 3d11d2a6c9a10de287e0f1b53a5e65d16afe2760affected
LinuxLinux0e2a9a03106cd5fa0dbc9047675e7645c55e2669 < 413b0b94d6d06b8d49735280e86a01dac90cf177affected
LinuxLinux0e2a9a03106cd5fa0dbc9047675e7645c55e2669 < b3d73e7440e0c40644285be1bda349cdf90122d8affected
LinuxLinux0e2a9a03106cd5fa0dbc9047675e7645c55e2669 < fc4f2f99530298a1739226947aa76525142d421daffected
LinuxLinux6.11affected
LinuxLinux0 < 6.11unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References