CVE-2026-89472

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89472", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.710Z", "datePublished": "2026-09-11T19:43:30.536Z", "dateUpdated": "2026-10-30T12:31:50.628Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:31:50.628Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: charger-manager: register regulators before exposing sysfs\n\ncharger_manager_remove() and the err_reg_extcon probe error path free each\ncharger regulator with regulator_put() before tearing down the power_supply\nsysfs entries (power_supply_unregister()). charger_manager_remove() also\ncalls try_charger_enable(cm, false) after the regulator_put() loop. A\nconcurrent write to a charger's externally_control sysfs attribute that\nlands between regulator_put() and power_supply_unregister() can run\ncharger_externally_control_store() and call try_charger_enable(), which,\nwhen charging is enabled, dereferences the already-freed consumer handle.\nWhen charging is enabled, try_charger_enable(cm, false) in .remove() also\ndereferences the freed handles directly. Both leave use-after-free windows.\nSymmetrically, probe registers the sysfs entries (power_supply_register)\nbefore acquiring the regulators (regulator_get, inside\ncharger_manager_register_extcon), so userspace can reach externally_control\nbefore the regulators are available.\n\nSplit charger_manager_register_extcon() on the sync/async boundary:\ncharger_manager_get_regulators() (regulator_get only, no async producer)\nnow runs before power_supply_register() so sysfs is not live before\nregulators are available, and charger_manager_register_extcon() keeps only\nthe extcon notifier/work setup, still after power_supply_register() so a\npower_supply_register() failure cannot reach extcon setup. This keeps the\nsysfs setup/teardown ordering symmetric without introducing an asynchronous\nproducer on the earlier probe-error path.\n\nMove power_supply_unregister() and try_charger_enable(cm, false) ahead of\nthe regulator_put() loop on both teardown paths, and adjust err_reg_extcon\n(power_supply_unregister() then fall through err_regulator for\nregulator_put(); get_regulators self-rolls back on its own failure).\n\nThis does not address the separate extcon-notifier-driven deref of the same\nhandles, which needs its own synchronization design.\n\nFound by an in-house static analysis tool."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The UAF is reached via local sysfs under /sys/class/power_supply/*/charger.N/{state,externally_control} and via charger_manager_remove()/probe unwind on the charger-manager platform device; this power-supply driver has no network, Bluetooth, or remote packet path into try_charger_enable() or the sysfs handlers.\nAC:L - An attacker can hammer the live sysfs attributes while teardown or probe unwind runs, controlling the sysfs side of the race; charger_manager_remove() also deterministically calls try_charger_enable() on already-freed regulator consumers when charging is enabled, with no attacker-uncontrollable memory layout required.\nPR:L - charger.N/state is mode 0444 and charger_state_show() calls regulator_is_enabled() on the consumer, so an unprivileged local user (including apps on charger-manager phones/embedded devices) can hit the UAF during the teardown or probe window; per driver-removal UAF precedent this is PR:L even though sysfs unbind itself is privileged.\nUI:N - The attacker performs their own sysfs reads or writes against the charger-manager power_supply attributes and can race driver unbind or probe; no separate victim action such as mounting a filesystem or confirming a prompt is required.\nS:U - The dangling struct regulator is kernel heap used by the same host kernel; this is a standard in-kernel use-after-free/privilege-escalation within one security authority, not a VM escape, IOMMU bypass, or sandbox breakout.\nC:H - regulator_put() kfree()s the struct regulator while charger_state_show() and try_charger_enable() still dereference the consumer; this heap UAF lets a reused object be read through regulator_is_enabled() and related helpers, enabling arbitrary kernel information disclosure.\nI:H - The same dangling consumer is passed to regulator_enable(), regulator_disable(), and regulator_force_disable() from try_charger_enable() and charger_externally_control_store(), so a sprayed heap object can turn the UAF into arbitrary writes and control-flow hijack.\nA:H - Use of the freed or still-NULL regulator consumer oopses or panics the kernel in regulator_is_enabled()/enable()/disable(), and the UAF crashes even when it is not fully converted into a read/write primitive."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/power/supply/charger-manager.c"], "versions": [{"version": "3950c7865cd7c963982a2c94457182b96732f4c9", "lessThan": "5763750916d28a29f1375a14dd6dadd5f2d2e178", "status": "affected", "versionType": "git"}, {"version": "3950c7865cd7c963982a2c94457182b96732f4c9", "lessThan": "6e1645a6ee85d070c2d8dd847f1ce110dc2455c1", "status": "affected", "versionType": "git"}, {"version": "3950c7865cd7c963982a2c94457182b96732f4c9", "lessThan": "af3ce383ba0d0d48957a22ac7058ff5698775898", "status": "affected", "versionType": "git"}, {"version": "3950c7865cd7c963982a2c94457182b96732f4c9", "lessThan": "86e4fa65368f3bbb506dddba8c9eedc75bd603b2", "status": "affected", "versionType": "git"}, {"version": "3950c7865cd7c963982a2c94457182b96732f4c9", "lessThan": "6d532582ff3c420598f02945b13184c738cc1581", "status": "affected", "versionType": "git"}, {"version": "3950c7865cd7c963982a2c94457182b96732f4c9", "lessThan": "c57cb36f76eb7ced45f57af1a890d8f3a6d76342", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/power/supply/charger-manager.c"], "versions": [{"version": "3.7", "status": "affected"}, {"version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5763750916d28a29f1375a14dd6dadd5f2d2e178"}, {"url": "https://git.kernel.org/stable/c/6e1645a6ee85d070c2d8dd847f1ce110dc2455c1"}, {"url": "https://git.kernel.org/stable/c/af3ce383ba0d0d48957a22ac7058ff5698775898"}, {"url": "https://git.kernel.org/stable/c/86e4fa65368f3bbb506dddba8c9eedc75bd603b2"}, {"url": "https://git.kernel.org/stable/c/6d532582ff3c420598f02945b13184c738cc1581"}, {"url": "https://git.kernel.org/stable/c/c57cb36f76eb7ced45f57af1a890d8f3a6d76342"}], "title": "power: supply: charger-manager: register regulators before exposing sysfs", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/power/supply/charger-manager.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5763750916d28a29f1375a14dd6dadd5f2d2e178", "status": "affected", "version": "3950c7865cd7c963982a2c94457182b96732f4c9", "versionType": "git"}, {"lessThan": "6e1645a6ee85d070c2d8dd847f1ce110dc2455c1", "status": "affected", "version": "3950c7865cd7c963982a2c94457182b96732f4c9", "versionType": "git"}, {"lessThan": "af3ce383ba0d0d48957a22ac7058ff5698775898", "status": "affected", "version": "3950c7865cd7c963982a2c94457182b96732f4c9", "versionType": "git"}, {"lessThan": "86e4fa65368f3bbb506dddba8c9eedc75bd603b2", "status": "affected", "version": "3950c7865cd7c963982a2c94457182b96732f4c9", "versionType": "git"}, {"lessThan": "6d532582ff3c420598f02945b13184c738cc1581", "status": "affected", "version": "3950c7865cd7c963982a2c94457182b96732f4c9", "versionType": "git"}, {"lessThan": "c57cb36f76eb7ced45f57af1a890d8f3a6d76342", "status": "affected", "version": "3950c7865cd7c963982a2c94457182b96732f4c9", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/power/supply/charger-manager.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.7"}, {"lessThan": "3.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: charger-manager: register regulators before exposing sysfs\n\ncharger_manager_remove() and the err_reg_extcon probe error path free each\ncharger regulator with regulator_put() before tearing down the power_supply\nsysfs entries (power_supply_unregister()). charger_manager_remove() also\ncalls try_charger_enable(cm, false) after the regulator_put() loop. A\nconcurrent write to a charger's externally_control sysfs attribute that\nlands between regulator_put() and power_supply_unregister() can run\ncharger_externally_control_store() and call try_charger_enable(), which,\nwhen charging is enabled, dereferences the already-freed consumer handle.\nWhen charging is enabled, try_charger_enable(cm, false) in .remove() also\ndereferences the freed handles directly. Both leave use-after-free windows.\nSymmetrically, probe registers the sysfs entries (power_supply_register)\nbefore acquiring the regulators (regulator_get, inside\ncharger_manager_register_extcon), so userspace can reach externally_control\nbefore the regulators are available.\n\nSplit charger_manager_register_extcon() on the sync/async boundary:\ncharger_manager_get_regulators() (regulator_get only, no async producer)\nnow runs before power_supply_register() so sysfs is not live before\nregulators are available, and charger_manager_register_extcon() keeps only\nthe extcon notifier/work setup, still after power_supply_register() so a\npower_supply_register() failure cannot reach extcon setup. This keeps the\nsysfs setup/teardown ordering symmetric without introducing an asynchronous\nproducer on the earlier probe-error path.\n\nMove power_supply_unregister() and try_charger_enable(cm, false) ahead of\nthe regulator_put() loop on both teardown paths, and adjust err_reg_extcon\n(power_supply_unregister() then fall through err_regulator for\nregulator_put(); get_regulators self-rolls back on its own failure).\n\nThis does not address the separate extcon-notifier-driven deref of the same\nhandles, which needs its own synchronization design.\n\nFound by an in-house static analysis tool."}], "id": "CVE-2026-89472", "lastModified": "2026-10-30T13:20:17.203", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:28.393", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5763750916d28a29f1375a14dd6dadd5f2d2e178"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6d532582ff3c420598f02945b13184c738cc1581"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e1645a6ee85d070c2d8dd847f1ce110dc2455c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/86e4fa65368f3bbb506dddba8c9eedc75bd603b2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/af3ce383ba0d0d48957a22ac7058ff5698775898"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c57cb36f76eb7ced45f57af1a890d8f3a6d76342"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Use-after-free in charger-manager due to race condition", "id": "2532356", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532356"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-364", "details": ["A flaw was found in the Linux kernel's power supply charger-manager component. A race condition exists where the system frees charger regulators before their corresponding sysfs entries are unregistered. A local attacker can exploit this by performing a concurrent write to a charger's `externally_control` sysfs attribute, leading to a use-after-free vulnerability. This can result in system instability, crashes, or potentially arbitrary code execution."], "name": "CVE-2026-89472", "public_date": "2026-09-11T19:43:30Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89472\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89472\nhttps://git.kernel.org/stable/c/6d532582ff3c420598f02945b13184c738cc1581\nhttps://git.kernel.org/stable/c/86e4fa65368f3bbb506dddba8c9eedc75bd603b2\nhttps://git.kernel.org/stable/c/af3ce383ba0d0d48957a22ac7058ff5698775898\nhttps://git.kernel.org/stable/c/c57cb36f76eb7ced45f57af1a890d8f3a6d76342"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3950c7865cd7c963982a2c94457182b96732f4c9,af3ce383ba0d0d48957a22ac7058ff5698775898)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3950c7865cd7c963982a2c94457182b96732f4c9,86e4fa65368f3bbb506dddba8c9eedc75bd603b2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3950c7865cd7c963982a2c94457182b96732f4c9,6d532582ff3c420598f02945b13184c738cc1581)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3950c7865cd7c963982a2c94457182b96732f4c9,c57cb36f76eb7ced45f57af1a890d8f3a6d76342)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T03:00:10.893798+00:00", "updated": "2026-09-15T23:00:16.561487+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}