{"id":"CVE-2026-89474","title":"power: supply: bq256xx: drain usb_work before freeing the charger","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: bq256xx: drain usb_work before freeing the charger\n\nThe USB-PHY notifier queues usb_work, whose handler calls\npower_supply_changed(bq->charger). The rese…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-825"],"vendor":"Linux","product":"Linux","affected":["Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 9dcfdf6c598301b278f0b3490eb2bf4f600524e2","Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < fd08d4dbbec07a44f01b0ddb041912be0dc88f8c","Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8","Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 9a467bd1e6811011026ad4c8de701b940d88a00c","Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 9e1aba34df9a87d53460888e05718717c0f69343","Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < c8addb842ae8dcf69c15fc976e33e3bd538a41d7","Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 2dd6cd823777bea6d9a880a12a92a73ec76aee0b","Linux 5.12"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:47:23.191Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89474","references":[{"url":"https://git.kernel.org/stable/c/9dcfdf6c598301b278f0b3490eb2bf4f600524e2"},{"url":"https://git.kernel.org/stable/c/fd08d4dbbec07a44f01b0ddb041912be0dc88f8c"},{"url":"https://git.kernel.org/stable/c/2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8"},{"url":"https://git.kernel.org/stable/c/9a467bd1e6811011026ad4c8de701b940d88a00c"},{"url":"https://git.kernel.org/stable/c/9e1aba34df9a87d53460888e05718717c0f69343"},{"url":"https://git.kernel.org/stable/c/c8addb842ae8dcf69c15fc976e33e3bd538a41d7"},{"url":"https://git.kernel.org/stable/c/2dd6cd823777bea6d9a880a12a92a73ec76aee0b"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89474.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89474"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532371"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89474"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89474"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89474.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00173,"epssPercentile":0.06649,"ingestedAt":"2026-09-14T15:23:07.453Z","slug":"CVE-2026-89474","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: bq256xx: drain usb_work before freeing the charger\n\nThe USB-PHY notifier queues usb_work, whose handler calls\npower_supply_changed(bq->charger). The reset devm action only unregisters\nthe notifier and was registered before the power supplies, so devm frees\nbq->charger on unwind before the action runs; a usb_work still queued can\nthen dereference it.\n\nRegister the reset action after the power supplies, so it unregisters\nthe notifiers and drains usb_work before the supplies are released.\nInitialize usb_work and obtain the PHY references before registering\nthe notifiers, so the worker cannot run before the supplies exist.\n\nFound by static analysis.\n\n## Affected\n\n- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 9dcfdf6c598301b278f0b3490eb2bf4f600524e2`\n- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < fd08d4dbbec07a44f01b0ddb041912be0dc88f8c`\n- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 2cfb59dc9df8b5ebdd95e3d874a7f4690cee2bc8`\n- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 9a467bd1e6811011026ad4c8de701b940d88a00c`\n- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 9e1aba34df9a87d53460888e05718717c0f69343`\n- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < c8addb842ae8dcf69c15fc976e33e3bd538a41d7`\n- `Linux >= 32e4978bb920d047fe5de3ea42d176f267c01f63 < 2dd6cd823777bea6d9a880a12a92a73ec76aee0b`\n- `Linux 5.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89474.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205476,"id":"CVE-2026-89474","ts":1789576721609,"field":"cvss","old":"4.4","new":"5.5"},{"seq":203974,"id":"CVE-2026-89474","ts":1789490230868,"field":"cvss","old":null,"new":"4.4"},{"seq":203973,"id":"CVE-2026-89474","ts":1789490230868,"field":"severity","old":"none","new":"medium"},{"seq":147313,"id":"CVE-2026-89474","ts":1789270209041,"field":"cvss","old":null,"new":"4.4"},{"seq":147312,"id":"CVE-2026-89474","ts":1789270209041,"field":"severity","old":"none","new":"medium"},{"seq":109064,"id":"CVE-2026-89474","ts":1789183730167,"field":"cvss","old":null,"new":"4.4"},{"seq":109063,"id":"CVE-2026-89474","ts":1789183730167,"field":"severity","old":"none","new":"medium"}]}