{"api_version":"1","generated_at":"2026-09-26T08:49:02+00:00","cve":"CVE-2026-89936","urls":{"html":"https://cve.report/CVE-2026-89936","api":"https://cve.report/api/cve/CVE-2026-89936.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89936","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89936"},"summary":{"title":"iio: dac: m62332: Fix regulator reference count imbalance","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: dac: m62332: Fix regulator reference count imbalance\n\nm62332_set_value() enables the Vcc regulator on every write of a\nnon-zero value and disables it on every write of zero, without tracking\nthe channel's current state. Because the regulator is reference counted,\nchanging a channel directly from one non-zero value to another enables\nit more than once, while a later write of zero disables it only once.\nThe reference count never returns to zero and the regulator is left\nenabled indefinitely.\n\nOnly enable the regulator on the transition from zero to non-zero, and\nonly disable it on the transition from non-zero to zero, using the\npreviously stored channel value to detect the edge. Balance the\nregulator on the I2C error path so the reference count stays consistent\nif the write fails.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-16 11:17:03","updated_at":"2026-09-16 11:17:03"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9","name":"https://git.kernel.org/stable/c/08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a130404ce0b69ca1438126bd81c1985d3b4d2e6f","name":"https://git.kernel.org/stable/c/a130404ce0b69ca1438126bd81c1985d3b4d2e6f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f5acb824277a97a5210c454872202bf7f08c75d4","name":"https://git.kernel.org/stable/c/f5acb824277a97a5210c454872202bf7f08c75d4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9fe22f563b2a0fdb11fd3711a8c39c023629c08a","name":"https://git.kernel.org/stable/c/9fe22f563b2a0fdb11fd3711a8c39c023629c08a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bac0ed8bee651aa841375edf72c6ab1d10ac80c6","name":"https://git.kernel.org/stable/c/bac0ed8bee651aa841375edf72c6ab1d10ac80c6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ae18d2d2ef27a4d04fda6e30c23774513dc9be1e","name":"https://git.kernel.org/stable/c/ae18d2d2ef27a4d04fda6e30c23774513dc9be1e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1d3a7d7dd3adee19e00be2b2237140f0fe169484","name":"https://git.kernel.org/stable/c/1d3a7d7dd3adee19e00be2b2237140f0fe169484","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9263b9ad968a563337a60e0eb66e35186e1faf9a","name":"https://git.kernel.org/stable/c/9263b9ad968a563337a60e0eb66e35186e1faf9a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89936","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89936","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b87b0c0f81e8d11c881b726b886b7502ab67d884 bac0ed8bee651aa841375edf72c6ab1d10ac80c6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b87b0c0f81e8d11c881b726b886b7502ab67d884 9263b9ad968a563337a60e0eb66e35186e1faf9a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b87b0c0f81e8d11c881b726b886b7502ab67d884 1d3a7d7dd3adee19e00be2b2237140f0fe169484 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b87b0c0f81e8d11c881b726b886b7502ab67d884 f5acb824277a97a5210c454872202bf7f08c75d4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.51 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.5 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/iio/dac/m62332.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"bac0ed8bee651aa841375edf72c6ab1d10ac80c6","status":"affected","version":"b87b0c0f81e8d11c881b726b886b7502ab67d884","versionType":"git"},{"lessThan":"9263b9ad968a563337a60e0eb66e35186e1faf9a","status":"affected","version":"b87b0c0f81e8d11c881b726b886b7502ab67d884","versionType":"git"},{"lessThan":"1d3a7d7dd3adee19e00be2b2237140f0fe169484","status":"affected","version":"b87b0c0f81e8d11c881b726b886b7502ab67d884","versionType":"git"},{"lessThan":"f5acb824277a97a5210c454872202bf7f08c75d4","status":"affected","version":"b87b0c0f81e8d11c881b726b886b7502ab67d884","versionType":"git"},{"lessThan":"ae18d2d2ef27a4d04fda6e30c23774513dc9be1e","status":"affected","version":"b87b0c0f81e8d11c881b726b886b7502ab67d884","versionType":"git"},{"lessThan":"08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9","status":"affected","version":"b87b0c0f81e8d11c881b726b886b7502ab67d884","versionType":"git"},{"lessThan":"9fe22f563b2a0fdb11fd3711a8c39c023629c08a","status":"affected","version":"b87b0c0f81e8d11c881b726b886b7502ab67d884","versionType":"git"},{"lessThan":"a130404ce0b69ca1438126bd81c1985d3b4d2e6f","status":"affected","version":"b87b0c0f81e8d11c881b726b886b7502ab67d884","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/iio/dac/m62332.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.2"},{"lessThan":"4.2","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.51","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.51","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.5","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"4.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: dac: m62332: Fix regulator reference count imbalance\n\nm62332_set_value() enables the Vcc regulator on every write of a\nnon-zero value and disables it on every write of zero, without tracking\nthe channel's current state. Because the regulator is reference counted,\nchanging a channel directly from one non-zero value to another enables\nit more than once, while a later write of zero disables it only once.\nThe reference count never returns to zero and the regulator is left\nenabled indefinitely.\n\nOnly enable the regulator on the transition from zero to non-zero, and\nonly disable it on the transition from non-zero to zero, using the\npreviously stored channel value to detect the edge. Balance the\nregulator on the I2C error path so the reference count stays consistent\nif the write fails."}],"providerMetadata":{"dateUpdated":"2026-09-16T10:32:25.608Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/bac0ed8bee651aa841375edf72c6ab1d10ac80c6"},{"url":"https://git.kernel.org/stable/c/9263b9ad968a563337a60e0eb66e35186e1faf9a"},{"url":"https://git.kernel.org/stable/c/1d3a7d7dd3adee19e00be2b2237140f0fe169484"},{"url":"https://git.kernel.org/stable/c/f5acb824277a97a5210c454872202bf7f08c75d4"},{"url":"https://git.kernel.org/stable/c/ae18d2d2ef27a4d04fda6e30c23774513dc9be1e"},{"url":"https://git.kernel.org/stable/c/08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9"},{"url":"https://git.kernel.org/stable/c/9fe22f563b2a0fdb11fd3711a8c39c023629c08a"},{"url":"https://git.kernel.org/stable/c/a130404ce0b69ca1438126bd81c1985d3b4d2e6f"}],"title":"iio: dac: m62332: Fix regulator reference count imbalance","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89936","datePublished":"2026-09-16T10:32:25.608Z","dateReserved":"2026-09-11T19:38:34.776Z","dateUpdated":"2026-09-16T10:32:25.608Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-16 11:17:03","lastModifiedDate":"2026-09-16 11:17:03","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89936","Ordinal":"1","Title":"iio: dac: m62332: Fix regulator reference count imbalance","CVE":"CVE-2026-89936","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89936","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: dac: m62332: Fix regulator reference count imbalance\n\nm62332_set_value() enables the Vcc regulator on every write of a\nnon-zero value and disables it on every write of zero, without tracking\nthe channel's current state. Because the regulator is reference counted,\nchanging a channel directly from one non-zero value to another enables\nit more than once, while a later write of zero disables it only once.\nThe reference count never returns to zero and the regulator is left\nenabled indefinitely.\n\nOnly enable the regulator on the transition from zero to non-zero, and\nonly disable it on the transition from non-zero to zero, using the\npreviously stored channel value to detect the edge. Balance the\nregulator on the I2C error path so the reference count stays consistent\nif the write fails.","Type":"Description","Title":"iio: dac: m62332: Fix regulator reference count imbalance"}]}}}