[CVE-2026-98956][LOW] ASoC: adau1372: allow sleepy powerdown GPIOs [ Upstream

[CVE-2026-98956][LOW] ASoC: adau1372: allow sleepy powerdown GPIOs [ Upstream

[AL-KERNEL]

CVE: CVE-2026-98956
Priority: LOW
AL-KERNEL base severity: LOW
KPANIC flag: NO
Patch: ASoC: adau1372: allow sleepy powerdown GPIOs [ Upstream
Commit: 58905982b0d912021325f5de84facae86cc0f2f2
Upstream patch: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=58905982b0d912021325f5de84facae86cc0f2f2
Original CVE announcement: https://lore.kernel.org/linux-cve-announce/?q=CVE-2026-98956
Analysis date: Mon, 26 Oct 2026 16:20:06 -0400
ActionableScore: 1
ActionableScore lower bound: unknown
Actionable bucket: Ordinary Moderate
Manual review required: NO

Summary:
ADAU1372 used a non-sleeping GPIO accessor for a sleep-capable powerdown GPIO, causing warnings and potentially unreliable codec power transitions without a demonstrated kernel-security primitive.

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ABOUT THIS REPORT
======================================================================

The original Linux kernel CVE announcement for CVE-2026-98956 is available here:
https://lore.kernel.org/linux-cve-announce/?q=CVE-2026-98956

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.

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AL-KERNEL CLASSIFICATION RESULT
======================================================================

CVE-2026-98956	LOW	https://www.kernelcve.org/list/?q=CVE-2026-98956 CHECK WITH IMPACT FROM ORIG NN LOW | AEGIS IMPACT LOW AEGIS_AS=0 LEGACY=LOW RESULT=SAME (final reconciliation agrees; DECISION: both LOW)	Maybe valid. Check manually. Hints by AL-KERNEL: The best (paranoid) CVSS is 'AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L';CWE-667;CWE-755;BEST CVSS score: '3.3';DESCR 'The ADAU1372 codec driver used gpiod_set_value for a powerdown GPIO even when the GPIO provider may sleep, as is common with I2C GPIO expanders. The call occurs in process context, but the non sleeping accessor emits a WARN and may make codec power transitions unreliable. For the CVSS the PR:L value reflects that a local user or process with access to the audio device may indirectly trigger power state transitions. The demonstrated impact is limited to the availability of the codec and warning handling, with no supported memory corruption, information disclosure, or privilege escalation primitive. Automated impact decision path. The original SimpleNet classifier selected LOW. The primary LLM estimated paranoid CVSS 3.3 and the production ActionableScore returned 1 with recommendation Ordinary Moderate. The production rules then evaluated CVSS thresholds and ActionableScore thresholds. No severity changing production threshold or specialist override was recorded. The legacy KP specialist has no review artifact for this run. The legacy FD or DH downgrade specialist has no review artifact for this run. The independent weaker Aegis shadow evaluated CVSS 0.0 and ActionableScore 0 with primitive class NONE and manual review NO. Its independently reconciled impact was LOW. The shadow agreed with the final production impact and aggregation did not change that impact. The final reported impact is LOW.';NO MANUAL CHECK; ,and ActionableScore result is Ordinary Moderate (with actual score 1)	MAYBE	WARNONLY SIMPLEFIX HARDWARE 	-	-	checked

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ACTIONABLESCORE ANALYSIS
======================================================================

ActionableScore=1
PrimitiveClass=NONE
RealUAF=NO
HostAdminRequired=UNKNOWN
NamespaceScopedPrivilege=UNKNOWN
ImportantCandidate=NO
ManualReview=NO
AutoDowngradeAllowed=YES
RequiresHostUID0=UNKNOWN
AuthorizationDecisionBypass=NO
ProtectedResourceImpact=NONE
B4PendingReview=NO
B4PendingConfirmed=NO

1. ActionableScore

* Raw base score: 1.
* Conservative score: 1; no floor or cap applied.
* Raw paranoid score: 1.
* Paranoid score: 1; no stronger patch-supported primitive exists.
* Final recommended bucket: **Ordinary Moderate**::

2. Signal breakdown

* +1 limited availability concern: using the non-sleeping GPIO accessor with a sleep-capable provider emits a WARN and may make codec power transitions unreliable.
* No reliable kernel crash point: the patch describes a warning and codec power-control problem, not panic or host-wide DoS.
* No memory corruption, OOB access, UAF, lifetime mutation, authorization bypass, disclosure, or protected-state modification is shown.
* No B5-R retry accumulation, B3 shared-backing write, B4 authorization-state issue, or active structured-state corruption exists.
* No local-unprivileged bonus: audio-device access may indirectly exercise power transitions, but the complete trigger and permissions are not established.
* No hardware penalty: the codec/GPIO-expander combination is hardware-specific, but it is not proven rare or physical-attacker-only.

3. Reachability analysis

The operation runs in process context during ADAU1372 power transitions. A local audio client may indirectly cause such transitions, but the evidence does not identify the userspace interface, device-node permissions, or whether runtime power management alone reaches every changed call. Therefore host-admin, host-UID-0, and namespace requirements remain unknown. No special race, retry sequence, prior privileged configuration, or attacker-controlled GPIO payload is shown.

4. Primitive and severity reading

The defect is an API-context mismatch: `gpiod_set_value()` warns when used with a GPIO controller whose operations may sleep, while `_cansleep()` is appropriate here. This is neither active structured corruption nor stale storage. The shown effect is warning emission and potentially unreliable codec shutdown; stronger host availability or security effects are unsupported. PrimitiveClass is NONE, ImportantCandidate is NO, and automatic downgrade is safe.

5. One-sentence report phrase

ADAU1372 used a non-sleeping GPIO accessor for a sleep-capable powerdown GPIO, causing warnings and potentially unreliable codec power transitions without a demonstrated kernel-security primitive.

6. Manual review advice

NO MANUAL CHECK NEEDED

The patch is a straightforward sleep-context compatibility correction with only device-local operational impact shown.

7. Call-site confidence

Call-site confidence: high

======================================================================
UPSTREAM PATCH SUMMARY
======================================================================

Patch: ASoC: adau1372: allow sleepy powerdown GPIOs [ Upstream
Commit: 58905982b0d912021325f5de84facae86cc0f2f2
Upstream URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=58905982b0d912021325f5de84facae86cc0f2f2

Changed files:
  sound/soc/codecs/adau1372.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=58905982b0d912021325f5de84facae86cc0f2f2

======================================================================
DETAILED REPORT METHODOLOGY
======================================================================

The original Linux kernel CVE announcement for CVE-2026-98956 can be found here:
https://lore.kernel.org/linux-cve-announce/?q=CVE-2026-98956

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: Not available
  The Best / paranoid CVSS vector: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
  The Best / paranoid CVSS score: 3.3

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: 1

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 alexanjelausa@gmail.com (and both
send reply to CVE record itself too and see "reply" button below for howto reply).