Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0e2a9a03106cd5fa0dbc9047675e7645c55e2669 before 3d11d2a6c9a10de287e0f1b53a5e65d16afe2760; affected 0e2a9a03106cd5fa0dbc9047675e7645c55e2669 before 413b0b94d6d06b8d49735280e86a01dac90cf177; affected 0e2a9a03106cd5fa0dbc9047675e7645c55e2669 before b3d73e7440e0c40644285be1bda349cdf90122d8; affected 0e2a9a03106cd5fa0dbc9047675e7645c55e2669 before fc4f2f99530298a1739226947aa76525142d421d |
| Linux / Linux | affected 6.11; unaffected 0 before 6.11; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.