* [CVE-2026-93130][LOW] platform/x86: dell-wmi-base: Fix resource leak on module load failure [ Upstream
@ 2026-09-17 18:00 21% AL-KERNEL
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From: AL-KERNEL @ 2026-09-17 18:00 UTC (permalink / raw)
To: kernel-cve
CVE: CVE-2026-93130
Priority: LOW
AL-KERNEL base severity: LOW
KPANIC flag: NO
Patch: platform/x86: dell-wmi-base: Fix resource leak on module load failure [ Upstream
Commit: 4877e20c64be0abfbf22c094b2bac386a87d6d07
Upstream patch: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=4877e20c64be0abfbf22c094b2bac386a87d6d07
Original CVE announcement: https://lore.kernel.org/linux-cve-announce/?q=CVE-2026-93130
Analysis date: Thu, 17 Sep 2026 14:00:40 -0400
ActionableScore: 0
ActionableScore lower bound: unknown
Actionable bucket: Ordinary Moderate
Manual review required: NO
Summary:
No one-sentence report phrase was found.
======================================================================
ABOUT THIS REPORT
======================================================================
The original Linux kernel CVE announcement for CVE-2026-93130 is available here:
https://lore.kernel.org/linux-cve-announce/?q=CVE-2026-93130
The original announcement does not normally provide a security severity
estimate, CVSS assessment, or enough information to determine whether the
reported kernel bug represents a practically relevant security issue.
This report was generated by AL-KERNEL, an AI-assisted Linux kernel
vulnerability analysis system developed by Alexander Larkin. It combines
an autonomous classifier with LLM-assisted technical analysis and a
separate ActionableScore mechanism.
The purpose of this report is to prioritize Linux kernel CVEs before
manual review, identify cases that require prompt investigation, and
support automatic closure of issues that are unlikely to have meaningful
security impact.
Published priority for this report: LOW
Manual review required: NO
A detailed explanation of the methodology and priority rules is included
at the end of this message.
======================================================================
AL-KERNEL CLASSIFICATION RESULT
======================================================================
CVE-2026-93130 LOW https://www.kernelcve.org/list/?q=CVE-2026-93130 CHECK WITH IMPACT FROM ORIG NN LOW Maybe valid. Check manually. Hints by AL-KERNEL: The best (paranoid) CVSS is 'AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H';*CWE-772;*CWE-401;CWE-404;Other CVSS 'AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L';BEST CVSS score: '4.1';DESCR 'dell_wmi_init did not fully unwind previously initialized resources when module load failed. The SMBIOS request state could remain enabled after dell_privacy_register_driver failed, and the privacy driver could remain registered if wmi_driver_register failed after privacy setup. For the CVSS the PR:H is used because reliable triggering normally requires administrative control over module loading or driver initialization failure conditions. The issue is not network reachable and is a local driver initialization cleanup problem. Impact is mainly denial of service or resource leakage with no evidence of memory corruption, information disclosure, or privilege escalation.';NO MANUAL CHECK; ,and ActionableScore result is Ordinary Moderate (with actual score 0) SKIP CVE-2026-93130 UNKNOWN SKIP The Fixes patch not applied yet, so unlikely that actual: 8af9fa37b8a3 YES NO NO unknown MAYBE INIT SIMPLEFIX LEAK HARDWARE - - checked
======================================================================
ACTIONABLESCORE ANALYSIS
======================================================================
ActionableScore=0
PrimitiveClass=NONE
RealUAF=NO
HostAdminRequired=YES
NamespaceScopedPrivilege=NO
ImportantCandidate=NO
ManualReview=NO
AutoDowngradeAllowed=YES
1. ActionableScore
* Raw conservative score: -1
* Conservative score: 0
* Raw paranoid score: 0
* Paranoid score: 0
* Applied conservative floor/cap: raw score clamped from -1 to 0
* Applied paranoid floor/cap: none
* Final recommended bucket: **Ordinary Moderate**::
2. Signal breakdown
Positive signals:
* +1 Concrete persistent kernel resource/reference leak. The patch directly shows missing unwind cleanup for already initialized Dell WMI privacy driver state and SMBIOS request state when module initialization fails.
* +1 Paranoid only: possible accumulated operational DoS or stale driver state if an administrator can repeatedly force failing module initialization. This remains a resource cleanup issue, not memory corruption.
Negative signals:
* -2 Host-admin-equivalent privilege required. The affected path is `dell_wmi_init()` during kernel module or built-in driver initialization failure, and reliable triggering requires administrative control over module loading, driver initialization, or platform-specific failure conditions.
Non-awarded signals:
* Real UAF not awarded. No stale post-free object use is established.
* Concrete repeated release/refcount not awarded. The patch adds missing unregister/disable cleanup, but does not show a second put/release/free on the same dangling reference.
* Reliable kernel crash not awarded. The commit describes a resource leak on module load failure, not a demonstrated panic or host-wide crash.
* C/I not awarded. No information disclosure, unauthorized modification, memory corruption, or privilege escalation primitive is shown.
* Remote reachability not awarded. This is not reachable through network traffic.
* Structured stale-object leverage not awarded. No stale object is consumed after lifetime end.
* Extra availability not awarded. Potential impact is limited resource or driver state leakage without evidence of immediate host-wide failure.
3. Reachability analysis
The trigger is local and tied to Dell WMI driver initialization failure. A normal user cannot directly execute `dell_wmi_init()` or force the relevant module load and registration failure sequence without host-admin-equivalent control. The complete operation is not namespace scoped. There is no evidence that a container, user namespace, or delegated capability can perform the required module initialization path. Prior host setup is effectively required because the Dell platform WMI driver must be present and the module or built-in init path must run. The issue is hardware/platform specific, but no separate rare-hardware penalty is needed because the host-admin requirement already dominates the practical risk. No race or timing requirement is established.
4. Primitive and severity interpretation
The exact primitive is a missing cleanup/unwind operation after partial initialization. If `dell_privacy_register_driver()` fails, the previous SMBIOS request state may remain enabled. If `wmi_driver_register()` fails after privacy setup, the privacy driver may remain registered. This is a resource/reference/state leak, not an active structured UAF and not fixed stale storage. There is no concrete repeated release/refcount operation. There is no evidence that the first operation frees an object and a second operation mutates lifetime state through the same dangling reference. PrimitiveClass is therefore NONE.
The demonstrated consequence is local resource leakage or stale driver state after failed module load. The speculative consequence is limited availability degradation if failures are repeatedly induced by an administrator. There is no meaningful exploitation leverage beyond cleanup/resource leakage. ImportantCandidate is NO because no kernel corruption, boundary bypass, LPE, or unresolved lifetime primitive exists. AutoDowngradeAllowed is YES because this is a host-admin-gated resource cleanup issue with no demonstrated security boundary impact.
5. One-sentence report phrase
A Dell WMI module initialization failure could leave SMBIOS request state or the privacy driver registered after an error, causing a local host-admin-triggered resource leak without evidence of memory corruption, information disclosure, privilege escalation, or network reachability.
6. Manual review recommendation
NO MANUAL CHECK NEEDED
Reason: this is a host-admin-gated module initialization cleanup/resource leak with no UAF, no corruption primitive, no authorization bypass, and no demonstrated host-wide crash.
7. Call-site confidence
Call-site confidence: high
======================================================================
UPSTREAM PATCH SUMMARY
======================================================================
Patch: platform/x86: dell-wmi-base: Fix resource leak on module load failure [ Upstream
Commit: 4877e20c64be0abfbf22c094b2bac386a87d6d07
Upstream URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=4877e20c64be0abfbf22c094b2bac386a87d6d07
Changed files:
drivers/platform/x86/dell/dell-wmi-base.c
Diff excerpt:
Not included in this email. See the upstream URL for the full patch.
Full patch:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=4877e20c64be0abfbf22c094b2bac386a87d6d07
======================================================================
DETAILED REPORT METHODOLOGY
======================================================================
The original Linux kernel CVE announcement for CVE-2026-93130 can be found here:
https://lore.kernel.org/linux-cve-announce/?q=CVE-2026-93130
The original CVE announcement normally does not include a security-level
estimate. In particular, it may not contain a CVSS assessment, an impact
level, or enough information to determine whether the reported bug is a
practically relevant security issue. One purpose of this parallel CVE list
is to provide that missing technical and prioritization information.
The original goal of the AL-KERNEL project was to prioritize Linux kernel
CVE analysis automatically before manual review. The system can also help
identify non-security issues that may be suitable for automatic closure.
This report was generated by AL-KERNEL, an AI-assisted Linux kernel
vulnerability analysis system developed by Alexander Larkin.
The first analysis stage combines an autonomous classifier with additional
LLM-based analysis. The autonomous classifier runs locally on a CPU and is
based on a backpropagation neural network. Together, these mechanisms
produce a technical vulnerability description, identify likely weakness
types, estimate CVSS severity, and provide input for ActionableScore.
Two CVSS estimates are retained because incomplete kernel vulnerability
information often permits more than one defensible interpretation:
Conservative CVSS vector: AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
The Best / paranoid CVSS vector: AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
The Best / paranoid CVSS score: 4.1
The conservative vector represents a lower-impact interpretation.
The Best/paranoid vector intentionally represents a plausible upper-bound
interpretation and should not automatically be treated as demonstrated
real-world impact.
CVSS may also need to be adjusted for a particular Linux deployment,
because actual reachability, privileges, enabled kernel configuration,
hardware, namespaces, exposed device nodes, and other environmental
conditions can differ significantly between systems.
A separate ActionableScore mechanism evaluates practical remediation
urgency. Its analysis may include reachability, attack prerequisites,
subsystem exposure, memory-corruption characteristics, denial-of-service
reliability, and possible confidentiality, integrity, or
privilege-escalation impact.
Conservative ActionableScore: unknown
Paranoid ActionableScore: 0
The final base severity is taken directly from the second tab-separated
field of the AL-KERNEL classification result. ActionableScore does not
replace or independently override that final AL-KERNEL decision, and
if ActionableScore adjusted impact level of ALKERNEL, then you would see
self-readable flags above like INCREASED_TO_HIGH_BASED_ON_ACTIONABLESCOREHIGHEREQTHAN7.
For an AL-KERNEL result of MODERATE, this report uses the following
additional presentation split:
ActionableScore below 5 -> MODERATE REGULAR
ActionableScore 5 or more -> MODERATE 7.0
The distinction between MODERATE REGULAR and MODERATE 7.0 makes it
possible to identify Moderate issues that should receive manual analysis
and fixes before lower-priority MODERATE REGULAR issues. In many cases,
MODERATE REGULAR fixes may wait for a later rebase or routine update.
There is one override in which MODERATE REGULAR becomes MODERATE 7.0
even when the ActionableScore is below 5. When the AL-KERNEL result
contains the KPANIC flag, a MODERATE result is always presented as
MODERATE 7.0. The KPANIC flag selected with few regexps without
usage of AI at all, so it helps to detect cases when Kernel Crash happens
and similar (to filter False-Negative results from the LLM usage).
KPANIC indicates that a reliable kernel crash, kernel panic, or similarly
serious kernel availability impact was identified by the classification
workflow.
AL-KERNEL base severity for this report: LOW
KPANIC detected for this report: NO
Published priority for this report (same as in Subject): LOW
These results are intended to support engineering triage. They are
machine-generated estimates, and cases marked for manual review should
be validated by a human security engineer before final disposition.
For more info read docs linked from here: https://kernelcve.org/
(and you can submit you own patch there to generate such a report
for non-existant CVE-id yet).
Note that in many cases this AI tool selects higher severity, than
real is (means you can expect Importants instead of Moderate 7.0 or
Moderates 7.0 instead of regular Moderates). If you see such cases,
please use reply email interface to add additional manual analyses
info to this particular CVE.
And please, please, let me know when you see Lows instead of Importants
or Important instead of Low (because particular for such cases I
need to tune this AI tool to make it better for this one and next similar).
My contact email for such notifications is [email protected] (and both
send reply to CVE record itself too and see "reply" button below for howto reply).
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