{"id":"CVE-2026-89936","revision":"e713c9d1a13147549316e443400abf85","records":[{"revision":"e713c9d1a13147549316e443400abf85","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89936","aliases":[],"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":0,"publishedAt":"2026-09-16T10:32:25.608+00:00","modifiedAt":"2026-10-19T08:55:10.788+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/iio/dac/m62332.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"b87b0c0f81e8d11c881b726b886b7502ab67d884\",\n                            \"lessThan\": \"bac0ed8bee651aa841375edf72c6ab1d10ac80c6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b87b0c0f81e8d11c881b726b886b7502ab67d884\",\n                            \"lessThan\": \"9263b9ad968a563337a60e0eb66e35186e1faf9a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b87b0c0f81e8d11c881b726b886b7502ab67d884\",\n                            \"lessThan\": \"1d3a7d7dd3adee19e00be2b2237140f0fe169484\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b87b0c0f81e8d11c881b726b886b7502ab67d884\",\n                            \"lessThan\": \"f5acb824277a97a5210c454872202bf7f08c75d4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b87b0c0f81e8d11c881b726b886b7502ab67d884\",\n                            \"lessThan\": \"ae18d2d2ef27a4d04fda6e30c23774513dc9be1e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b87b0c0f81e8d11c881b726b886b7502ab67d884\",\n                            \"lessThan\": \"08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b87b0c0f81e8d11c881b726b886b7502ab67d884\",\n                            \"lessThan\": \"9fe22f563b2a0fdb11fd3711a8c39c023629c08a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b87b0c0f81e8d11c881b726b886b7502ab67d884\",\n                            \"lessThan\": \"a130404ce0b69ca1438126bd81c1985d3b4d2e6f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/iio/dac/m62332.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.51\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.5\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/bac0ed8bee651aa841375edf72c6ab1d10ac80c6","https://git.kernel.org/stable/c/9263b9ad968a563337a60e0eb66e35186e1faf9a","https://git.kernel.org/stable/c/1d3a7d7dd3adee19e00be2b2237140f0fe169484","https://git.kernel.org/stable/c/f5acb824277a97a5210c454872202bf7f08c75d4","https://git.kernel.org/stable/c/ae18d2d2ef27a4d04fda6e30c23774513dc9be1e","https://git.kernel.org/stable/c/08ac8d2976d57aa943d64e351c4d0bd8bb0c6de9","https://git.kernel.org/stable/c/9fe22f563b2a0fdb11fd3711a8c39c023629c08a","https://git.kernel.org/stable/c/a130404ce0b69ca1438126bd81c1985d3b4d2e6f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89936","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89936","identifiers":["CVE-2026-89936"]},"retained":false,"historicalAffected":[]}],"coverage":[]}