mailbox: qcom-cpucp: handle NULL data in send_data callback
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.
CVE-2026-90192
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90192
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "0e2a9a03106cd5fa0dbc9047675e7645c55e2669",
"lessThan": "3d11d2a6c9a10de287e0f1b53a5e65d16afe2760",
"versionType": "git"
},
{
"status": "affected",
"version": "0e2a9a03106cd5fa0dbc9047675e7645c55e2669",
"lessThan": "413b0b94d6d06b8d49735280e86a01dac90cf177",
"versionType": "git"
},
{
"status": "affected",
"version": "0e2a9a03106cd5fa0dbc9047675e7645c55e2669",
"lessThan": "b3d73e7440e0c40644285be1bda349cdf90122d8",
"versionType": "git"
},
{
"status": "affected",
"version": "0e2a9a03106cd5fa0dbc9047675e7645c55e2669",
"lessThan": "fc4f2f99530298a1739226947aa76525142d421d",
"versionType": "git"
}
],
"programFiles": [
"drivers/mailbox/qcom-cpucp-mbox.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/mailbox/qcom-cpucp-mbox.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90192
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36570 · Revision 1
- Added to Heist Feed
- Publisher date