Linux Kernel up to 7.2.4 IIO DAC m62332_set_value denial of service

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4.0	$0-$5k	0.44

Summaryinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 7.2.4. Affected by this vulnerability is the function m62332_set_value of the component IIO DAC. The manipulation results in denial of service. This vulnerability is cataloged as CVE-2026-89936. The attack must be initiated from a local position. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.2.4. It has been classified as problematic. Affected is the function m62332_set_value of the component IIO DAC. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: iio: dac: m62332: Fix regulator reference count imbalance m62332_set_value() enables the Vcc regulator on every write of a non-zero value and disables it on every write of zero, without tracking the channel's current state. Because the regulator is reference counted, changing a channel directly from one non-zero value to another enables it more than once, while a later write of zero disables it only once. The reference count never returns to zero and the regulator is left enabled indefinitely. Only enable the regulator on the transition from zero to non-zero, and only disable it on the transition from non-zero to zero, using the previously stored channel value to detect the edge. Balance the regulator on the I2C error path so the reference count stays consistent if the write fails.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-89936 since 09/11/2026. The exploitability is told to be easy. Local access is required to approach this attack. Additional levels of successful authentication are needed for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5 or 7.3-rc1 eliminates this vulnerability. Applying the patch bac0ed8bee651aa841375edf72c6ab1d10ac80c6/9263b9ad968a563337a60e0eb66e35186e1faf9a/1d3a7d7dd3adee19e00be2b2237140f0fe169484/f5acb824277a97a5210c454872202bf7f08c75d4/ae18d2d2ef27a4d04fda6e30c23774513dc9be1e/08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9/9fe22f563b2a0fdb11fd3711a8c39c023629c08a/a130404ce0b69ca1438126bd81c1985d3b4d2e6f is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.10.269
• 5.15.220
• 6.1.187
• 6.6.156
• 6.12.109
• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
• 6.18.9
• 6.18.10
• 6.18.11
• 6.18.12
• 6.18.13
• 6.18.14
• 6.18.15
• 6.18.16
• 6.18.17
• 6.18.18
• 6.18.19
• 6.18.20
• 6.18.21
• 6.18.22
• 6.18.23
• 6.18.24
• 6.18.25
• 6.18.26
• 6.18.27
• 6.18.28
• 6.18.29
• 6.18.30
• 6.18.31
• 6.18.32
• 6.18.33
• 6.18.34
• 6.18.35
• 6.18.36
• 6.18.37
• 6.18.38
• 6.18.39
• 6.18.40
• 6.18.41
• 6.18.42
• 6.18.43
• 6.18.44
• 6.18.45
• 6.18.46
• 6.18.47
• 6.18.48
• 6.18.49
• 6.18.50
• 7.2.0
• 7.2.1
• 7.2.2
• 7.2.3
• 7.2.4

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.270/5.15.221/6.1.188/6.6.157/6.12.110/6.18.51/7.2.5/7.3-rc1
Patch: bac0ed8bee651aa841375edf72c6ab1d10ac80c6/9263b9ad968a563337a60e0eb66e35186e1faf9a/1d3a7d7dd3adee19e00be2b2237140f0fe169484/f5acb824277a97a5210c454872202bf7f08c75d4/ae18d2d2ef27a4d04fda6e30c23774513dc9be1e/08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9/9fe22f563b2a0fdb11fd3711a8c39c023629c08a/a130404ce0b69ca1438126bd81c1985d3b4d2e6f

Timelineinfo

09/11/2026 CVE reserved
09/16/2026 +5 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89936 (🔒)
GCVE (CVE): GCVE-0-2026-89936
GCVE (VulDB): GCVE-100-405834

Entryinfo

Created: 09/16/2026 15:15
Changes: 09/16/2026 15:15 (59)
Complete: 🔍
Cache ID: 216::103

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