mailbox: qcom-cpucp: handle NULL data in send_data callback (CVE-2026-90192) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90192

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

Answer in brief

CVE-2026-90192 records a Unknown severity vulnerability in mailbox: qcom-cpucp: handle NULL data in send_data callback. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=0e2a9a03106cd5fa0dbc9047675e7645c55e2669 <3d11d2a6c9a10de287e0f1b53a5e65d16afe2760 \|\| >=0e2a9a03106cd5fa0dbc9047675e7645c55e2669 <413b0b94d6d06b8d49735280e86a01dac90cf177 \|\| >=0e2a9a03106cd5fa0dbc9047675e7645c55e2669 <b3d73e7440e0c40644285be1bda349cdf90122d8 \|\| >=0e2a9a03106cd5fa0dbc9047675e7645c55e2669 <fc4f2f99530298a1739226947aa76525142d421d	3d11d2a6c9a10de287e0f1b53a5e65d16afe2760, 413b0b94d6d06b8d49735280e86a01dac90cf177, b3d73e7440e0c40644285be1bda349cdf90122d8, fc4f2f99530298a1739226947aa76525142d421d
Linux/Linuxgeneric	6.11	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 3d11d2a6c9a10de287e0f1b53a5e65d16afe2760 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.