iio: dac: m62332: Fix regulator reference count imbalance

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89936
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 11:17:03 UTC
Updated2026-09-16 11:17:03 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b87b0c0f81e8d11c881b726b886b7502ab67d884 bac0ed8bee651aa841375edf72c6ab1d10ac80c6 git Not specified
CNA Linux Linux affected b87b0c0f81e8d11c881b726b886b7502ab67d884 9263b9ad968a563337a60e0eb66e35186e1faf9a git Not specified
CNA Linux Linux affected b87b0c0f81e8d11c881b726b886b7502ab67d884 1d3a7d7dd3adee19e00be2b2237140f0fe169484 git Not specified
CNA Linux Linux affected b87b0c0f81e8d11c881b726b886b7502ab67d884 f5acb824277a97a5210c454872202bf7f08c75d4 git Not specified
CNA Linux Linux affected b87b0c0f81e8d11c881b726b886b7502ab67d884 ae18d2d2ef27a4d04fda6e30c23774513dc9be1e git Not specified
CNA Linux Linux affected b87b0c0f81e8d11c881b726b886b7502ab67d884 08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9 git Not specified
CNA Linux Linux affected b87b0c0f81e8d11c881b726b886b7502ab67d884 9fe22f563b2a0fdb11fd3711a8c39c023629c08a git Not specified
CNA Linux Linux affected b87b0c0f81e8d11c881b726b886b7502ab67d884 a130404ce0b69ca1438126bd81c1985d3b4d2e6f git Not specified
CNA Linux Linux affected 4.2 Not specified
CNA Linux Linux unaffected 4.2 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.51 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.5 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a130404ce0b69ca1438126bd81c1985d3b4d2e6f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f5acb824277a97a5210c454872202bf7f08c75d4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9fe22f563b2a0fdb11fd3711a8c39c023629c08a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bac0ed8bee651aa841375edf72c6ab1d10ac80c6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ae18d2d2ef27a4d04fda6e30c23774513dc9be1e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1d3a7d7dd3adee19e00be2b2237140f0fe169484 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9263b9ad968a563337a60e0eb66e35186e1faf9a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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