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CVE-2026-89936· NVD / CVE Program· CNA Linux

iio: dac: m62332: Fix regulator reference count imbalance

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.

—No exploit Fix available

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Published
Sep 16, 2026
Updated
Sep 16, 2026
EPSS
0.2% · 11th percentile
CWE
—
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Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.2affected
    • b87b0c0f81e8d11c881b726b886b7502ab67d884 and later · before bac0ed8bee651aa841375edf72c6ab1d10ac80c6affected · git
    • b87b0c0f81e8d11c881b726b886b7502ab67d884 and later · before 9263b9ad968a563337a60e0eb66e35186e1faf9aaffected · git
    • b87b0c0f81e8d11c881b726b886b7502ab67d884 and later · before 1d3a7d7dd3adee19e00be2b2237140f0fe169484affected · git
    • b87b0c0f81e8d11c881b726b886b7502ab67d884 and later · before f5acb824277a97a5210c454872202bf7f08c75d4affected · git
    • b87b0c0f81e8d11c881b726b886b7502ab67d884 and later · before ae18d2d2ef27a4d04fda6e30c23774513dc9be1eaffected · git
    • b87b0c0f81e8d11c881b726b886b7502ab67d884 and later · before 08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9affected · git
    • b87b0c0f81e8d11c881b726b886b7502ab67d884 and later · before 9fe22f563b2a0fdb11fd3711a8c39c023629c08aaffected · git
    • b87b0c0f81e8d11c881b726b886b7502ab67d884 and later · before a130404ce0b69ca1438126bd81c1985d3b4d2e6faffected · git
    • before 4.2not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxall versions—
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

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  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9Vendor (CNA)
Linux Linux1d3a7d7dd3adee19e00be2b2237140f0fe169484Vendor (CNA)
Linux Linux9263b9ad968a563337a60e0eb66e35186e1faf9aVendor (CNA)
Linux Linux9fe22f563b2a0fdb11fd3711a8c39c023629c08aVendor (CNA)
Linux Linuxa130404ce0b69ca1438126bd81c1985d3b4d2e6fVendor (CNA)
Linux Linuxae18d2d2ef27a4d04fda6e30c23774513dc9be1eVendor (CNA)
Linux Linuxbac0ed8bee651aa841375edf72c6ab1d10ac80c6Vendor (CNA)
Linux Linuxf5acb824277a97a5210c454872202bf7f08c75d4Vendor (CNA)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records