power: supply: ab8500_fg: fix use-after-free on remove (CVE-2026-89797) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89797

power: supply: ab8500_fg: fix use-after-free on remove

Answer in brief

CVE-2026-89797 records a Unknown severity vulnerability in power: supply: ab8500_fg: fix use-after-free on remove. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=13151631b5bd06a1511353bb221079bbd76606c3 <c660c017dec1fd7cd88e1103c5ae1aae6ce636bf \|\| >=13151631b5bd06a1511353bb221079bbd76606c3 <013731074ab6a8d11ec209eee64c5b2656954479 \|\| >=13151631b5bd06a1511353bb221079bbd76606c3 <75b1e88d34254f4fb7753345e21bfee47abddd7f	c660c017dec1fd7cd88e1103c5ae1aae6ce636bf, 013731074ab6a8d11ec209eee64c5b2656954479, 75b1e88d34254f4fb7753345e21bfee47abddd7f
Linux/Linuxgeneric	3.4	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to c660c017dec1fd7cd88e1103c5ae1aae6ce636bf if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.