power: supply: ab8500_fg: fix use-after-free on remove
ab8500_fg_remove() destroys the driver workqueue while the threaded
interrupt handlers are still armed; they are devm-managed and freed
only after ->remove() returns, so a handler that fires in that
window queues work on the freed workqueue.
Tear the workqueue down through devm instead, registering its cleanup
after the power supply and before the interrupt requests. devm then
frees the interrupts first, so the handlers can no longer queue work,
before disabling the delayed and plain work items and destroying the
workqueue. Disabling the items, rather than cancelling them, keeps
them disabled so no producer (including the power-supply
external_power_changed callback) can requeue them.
Found by an in-house static analysis tool.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
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| Linux | Linux | affected |
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No data.
No data.
No data available yet.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Wed, 16 Sep 2026 10:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: power: supply: ab8500_fg: fix use-after-free on remove ab8500_fg_remove() destroys the driver workqueue while the threaded interrupt handlers are still armed; they are devm-managed and freed only after ->remove() returns, so a handler that fires in that window queues work on the freed workqueue. Tear the workqueue down through devm instead, registering its cleanup after the power supply and before the interrupt requests. devm then frees the interrupts first, so the handlers can no longer queue work, before disabling the delayed and plain work items and destroying the workqueue. Disabling the items, rather than cancelling them, keeps them disabled so no producer (including the power-supply external_power_changed callback) can requeue them. Found by an in-house static analysis tool. | |
| Title | power: supply: ab8500_fg: fix use-after-free on remove | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-09-16T10:30:28.484Z
Reserved: 2026-09-11T19:38:34.767Z
Link: CVE-2026-89797
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-16T11:16:44.547
Modified: 2026-09-16T11:16:44.547
Link: CVE-2026-89797
Redhat
No data.
OpenCVE Enrichment
No data.
No weakness.