GHSA-39H4-XRH5-39FG
Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31In 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": [],
"aliases": [
"CVE-2026-90192"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:13Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: qcom-cpucp: handle NULL data in send_data callback\n\nmailbox_clear_channel() calls mbox_send_message() with NULL data to\nnotify the remote side that the RX channel has been cleared.\nqcom_cpucp_mbox_send_data() blindly dereferenced the data pointer,\ncausing a NULL pointer dereference kernel panic when invoked from\nthis path under PREEMPT_RT.\n\nAdd an explicit NULL check and return early without writing to the\nTX register, which is the correct behaviour for a channel-clear\nnotification.",
"id": "GHSA-39h4-xrh5-39fg",
"modified": "2026-09-17T18:31:54Z",
"published": "2026-09-17T18:31:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90192"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3d11d2a6c9a10de287e0f1b53a5e65d16afe2760"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/413b0b94d6d06b8d49735280e86a01dac90cf177"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b3d73e7440e0c40644285be1bda349cdf90122d8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fc4f2f99530298a1739226947aa76525142d421d"
}
],
"schema_version": "1.4.0",
"severity": []
}
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