CVE-2026-45869 - Vulnerability Details

- power: supply: wm97xx: Fix NULL pointer dereference in power_supply_changed()

Description

In the Linux kernel, the following vulnerability has been resolved:

power: supply: wm97xx: Fix NULL pointer dereference in power_supply_changed()

In `probe()`, `request_irq()` is called before allocating/registering a
`power_supply` handle. If an interrupt is fired between the call to
`request_irq()` and `power_supply_register()`, the `power_supply` handle
will be used uninitialized in `power_supply_changed()` in
`wm97xx_bat_update()` (triggered from the interrupt handler). This will
lead to a `NULL` pointer dereference since

Fix this racy `NULL` pointer dereference by making sure the IRQ is
requested _after_ the registration of the `power_supply` handle. Since
the IRQ is the last thing requests in the `probe()` now, remove the
error path for freeing it. Instead add one for unregistering the
`power_supply` handle when IRQ request fails.

Published: 2026-05-27

Score: 5.5 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

A race condition exists in the Linux kernel wm97xx power‑supply driver. When an interrupt occurs between the request for the IRQ and the registration of the power_supply handle, the driver uses an uninitialized pointer in power_supply_changed(), causing a NULL pointer dereference. This leads to a kernel panic and service disruption.

Affected Systems

All Linux kernel releases that include the unpatched wm97xx driver are vulnerable. The driver is part of the main kernel source tree and is present in every kernel version that has the wm97xx hardware support compiled in.

Risk and Exploitability

The CVSS score of 5.5 indicates moderate severity. The EPSS score of less than 1 % suggests a very low likelihood of exploitation. The vulnerability is not in the CISA KEV catalog. Based on the description, it is inferred that an interrupt would need to be generated between request_irq() and power_supply_register(), which typically requires low‑level hardware access or privileged local execution. While widespread exploitation is unlikely, any successful trigger results in a kernel crash that denies all services.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`7c87942aef52d2120e95ff1dec739998b9f95a78`	affected	< 3d7b5391bb95505b3581c1fb77150c467ab92864
`7c87942aef52d2120e95ff1dec739998b9f95a78`	affected	< 438f9a303ea8b55162b2d5376490c2ab3ec165a0
`7c87942aef52d2120e95ff1dec739998b9f95a78`	affected	< 9b7d77cb046b4487e8e511e04e62b6f416ce845c
`7c87942aef52d2120e95ff1dec739998b9f95a78`	affected	< 86183153c299e8bb1839e717286d6c6f39508a59
`7c87942aef52d2120e95ff1dec739998b9f95a78`	affected	< 93bdf715d33cf5ee01c58e8546c2469c71ce082a
`7c87942aef52d2120e95ff1dec739998b9f95a78`	affected	< c0def811ad8d642dca9b6d31a198cc39f5f90837
`7c87942aef52d2120e95ff1dec739998b9f95a78`	affected	< dfaf235d5a6b60cbf115a14a656946303ad007b7
`7c87942aef52d2120e95ff1dec739998b9f95a78`	affected	< 39fe0eac6d755ef215026518985fcf8de9360e9e

Linux

affected

Version	Status	Constraints
`2.6.32`	affected	—
`0`	unaffected	< 2.6.32
`5.10.252`	unaffected	≤ 5.10.*
`5.15.202`	unaffected	≤ 5.15.*
`6.1.165`	unaffected	≤ 6.1.*
`6.6.128`	unaffected	≤ 6.6.*
`6.12.75`	unaffected	≤ 6.12.*
`6.18.14`	unaffected	≤ 6.18.*
`6.19.4`	unaffected	≤ 6.19.*
`7.0`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[7c87942aef52d2120e95ff1dec739998b9f95a78,3d7b5391bb95505b3581c1fb77150c467ab92864)`	affected	code_commit	—
`[7c87942aef52d2120e95ff1dec739998b9f95a78,438f9a303ea8b55162b2d5376490c2ab3ec165a0)`	affected	code_commit	—
`[7c87942aef52d2120e95ff1dec739998b9f95a78,9b7d77cb046b4487e8e511e04e62b6f416ce845c)`	affected	code_commit	—
`[7c87942aef52d2120e95ff1dec739998b9f95a78,86183153c299e8bb1839e717286d6c6f39508a59)`	affected	code_commit	—
`[7c87942aef52d2120e95ff1dec739998b9f95a78,93bdf715d33cf5ee01c58e8546c2469c71ce082a)`	affected	code_commit	—
`[7c87942aef52d2120e95ff1dec739998b9f95a78,c0def811ad8d642dca9b6d31a198cc39f5f90837)`	affected	code_commit	—
`[7c87942aef52d2120e95ff1dec739998b9f95a78,dfaf235d5a6b60cbf115a14a656946303ad007b7)`	affected	code_commit	—
`[7c87942aef52d2120e95ff1dec739998b9f95a78,39fe0eac6d755ef215026518985fcf8de9360e9e)`	affected	code_commit	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`2.6.32`	affected	semver	—
`[0,2.6.32)`	unaffected	semver	—
`[5.10.252,5.11.0)`	unaffected	semver	—
`[5.15.202,5.16.0)`	unaffected	semver	—
`[6.1.165,6.2.0)`	unaffected	semver	—
`[6.6.128,6.7.0)`	unaffected	semver	—
`[6.12.75,6.13.0)`	unaffected	semver	—
`[6.18.14,6.19.0)`	unaffected	semver	—
`[6.19.4,6.20.0)`	unaffected	semver	—
`[7.0,*]`	unaffected	semver	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Update the kernel to a release that contains the patch for the wm97xx driver
If a kernel upgrade is not possible, remove or disable the wm97xx power‑supply module to eliminate the race condition
Configure the system to blacklist the wm97xx driver if it is not required for operation
Monitor system logs for kernel oops or panic messages that indicate an attempted trigger

Generated by OpenCVE AI on August 13, 2026 at 23:29 UTC.

Tracking

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Advisories

Source	ID	Title
Debian DLA	DLA-4606-1	linux security update
Ubuntu USN	USN-8492-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8492-2	Linux kernel vulnerabilities
Ubuntu USN	USN-8497-1	Linux kernel (Low Latency) vulnerabilities
Ubuntu USN	USN-8498-1	Linux kernel (NVIDIA Tegra) vulnerabilities
Ubuntu USN	USN-8499-1	Linux kernel (Xilinx) vulnerabilities
Ubuntu USN	USN-8492-3	Linux kernel (Raspberry Pi Real-time) vulnerabilities
Ubuntu USN	USN-8492-4	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-8492-5	Linux kernel (FIPS) vulnerabilities
Ubuntu USN	USN-8575-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8576-1	Linux kernel (NVIDIA Tegra) vulnerabilities
Ubuntu USN	USN-8575-2	Linux kernel vulnerabilities
Ubuntu USN	USN-8576-2	Linux kernel (NVIDIA Tegra) vulnerabilities
Ubuntu USN	USN-8575-3	Linux kernel vulnerabilities
Ubuntu USN	USN-8606-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8607-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8609-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8610-1	Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN	USN-8619-1	Linux kernel (HWE) vulnerabilities
Ubuntu USN	USN-8620-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8620-2	Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN	USN-8620-3	Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN	USN-8620-4	Linux kernel (Intel IoTG) vulnerabilities

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0016.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/39fe0eac6d755ef215026518985fcf8de9360e9e
https://git.kernel.org/stable/c/3d7b5391bb95505b3581c1fb77150c467ab92864
https://git.kernel.org/stable/c/438f9a303ea8b55162b2d5376490c2ab3ec165a0
https://git.kernel.org/stable/c/86183153c299e8bb1839e717286d6c6f39508a59
https://git.kernel.org/stable/c/93bdf715d33cf5ee01c58e8546c2469c71ce082a
https://git.kernel.org/stable/c/9b7d77cb046b4487e8e511e04e62b6f416ce845c
https://git.kernel.org/stable/c/c0def811ad8d642dca9b6d31a198cc39f5f90837
https://git.kernel.org/stable/c/dfaf235d5a6b60cbf115a14a656946303ad007b7
https://lore.kernel.org/linux-cve-announce/2026052712-CVE-2026-45869-9867@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-45869
https://www.cve.org/CVERecord?id=CVE-2026-45869

History

Thu, 28 May 2026 14:30:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-409 CWE-476

Thu, 28 May 2026 12:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-824
References		https://lore.kernel.org/linux-cve-announce/2026052712-CVE-2026-45869-9867@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2026-45869 https://www.cve.org/CVERecord?id=CVE-2026-45869

Wed, 27 May 2026 21:00:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-409 CWE-476

Wed, 27 May 2026 14:15:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: power: supply: wm97xx: Fix NULL pointer dereference in power_supply_changed() In `probe()`, `request_irq()` is called before allocating/registering a `power_supply` handle. If an interrupt is fired between the call to `request_irq()` and `power_supply_register()`, the `power_supply` handle will be used uninitialized in `power_supply_changed()` in `wm97xx_bat_update()` (triggered from the interrupt handler). This will lead to a `NULL` pointer dereference since Fix this racy `NULL` pointer dereference by making sure the IRQ is requested _after_ the registration of the `power_supply` handle. Since the IRQ is the last thing requests in the `probe()` now, remove the error path for freeing it. Instead add one for unregistering the `power_supply` handle when IRQ request fails.
Title		power: supply: wm97xx: Fix NULL pointer dereference in power_supply_changed()
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/39fe0eac6d755ef215026518985fcf8de9360e9e https://git.kernel.org/stable/c/3d7b5391bb95505b3581c1fb77150c467ab92864 https://git.kernel.org/stable/c/438f9a303ea8b55162b2d5376490c2ab3ec165a0 https://git.kernel.org/stable/c/86183153c299e8bb1839e717286d6c6f39508a59 https://git.kernel.org/stable/c/93bdf715d33cf5ee01c58e8546c2469c71ce082a https://git.kernel.org/stable/c/9b7d77cb046b4487e8e511e04e62b6f416ce845c https://git.kernel.org/stable/c/c0def811ad8d642dca9b6d31a198cc39f5f90837 https://git.kernel.org/stable/c/dfaf235d5a6b60cbf115a14a656946303ad007b7

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-05-27T12:15:49.107Z

Updated: 2026-05-27T12:15:49.107Z

Reserved: 2026-05-13T15:03:33.080Z

Link: CVE-2026-45869

Vulnrichment

No data.

NVD

Status : Analyzed

Published: 2026-05-27T14:17:00.290

Modified: 2026-06-25T21:06:30.297

Link: CVE-2026-45869

Redhat

Severity :

Publid Date: 2026-05-27T00:00:00Z

Links: CVE-2026-45869 - Bugzilla

OpenCVE Enrichment

Updated: 2026-08-13T23:30:03Z

Weaknesses

CWE-476
NULL Pointer Dereference
CWE-824
Access of Uninitialized Pointer

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Subscriptions

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