In the Linux kernel, the following vulnerability has been resolved: power: supply: max17040: synchronize work cancellation on suspend… (CVE-2026-89461)
A vulnerability in the Linux kernel's power supply driver for max17040 was resolved. The issue involved improper synchronization of work cancellation during system suspend, where a polling callback could continue running and requeue itself after suspend, potentially causing unexpected behavior. The fix ensures that polling is fully quiesced before suspend completes by using cancel_delayed_work_sync().
AI Analysis
Technical Summary
The Linux kernel max17040 power supply driver had a race condition vulnerability where max17040_work() requeued itself after every poll. The cancel_delayed_work() function only cancels pending work but does not wait for a currently running callback to finish. If system suspend races with this polling callback, the callback could continue accessing the fuel gauge and requeue itself after suspend returns. The vulnerability was resolved by replacing cancel_delayed_work() with cancel_delayed_work_sync() to ensure the polling callback is fully stopped before suspend completes.
Potential Impact
If system suspend races with the polling callback, the callback may continue running and requeue itself after suspend completes, potentially causing inconsistent state or unexpected behavior in the fuel gauge driver during suspend/resume cycles. No direct exploitation or further impact details are provided.
Mitigation Recommendations
A fix is available that replaces cancel_delayed_work() with cancel_delayed_work_sync() to properly synchronize work cancellation on suspend. Users should apply the updated Linux kernel version containing this fix. No other mitigation steps are indicated.
In the Linux kernel, the following vulnerability has been resolved: power: supply: max17040: synchronize work cancellation on suspend… (CVE-2026-89461)
Description
A vulnerability in the Linux kernel's power supply driver for max17040 was resolved. The issue involved improper synchronization of work cancellation during system suspend, where a polling callback could continue running and requeue itself after suspend, potentially causing unexpected behavior. The fix ensures that polling is fully quiesced before suspend completes by using cancel_delayed_work_sync().
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel max17040 power supply driver had a race condition vulnerability where max17040_work() requeued itself after every poll. The cancel_delayed_work() function only cancels pending work but does not wait for a currently running callback to finish. If system suspend races with this polling callback, the callback could continue accessing the fuel gauge and requeue itself after suspend returns. The vulnerability was resolved by replacing cancel_delayed_work() with cancel_delayed_work_sync() to ensure the polling callback is fully stopped before suspend completes.
Potential Impact
If system suspend races with the polling callback, the callback may continue running and requeue itself after suspend completes, potentially causing inconsistent state or unexpected behavior in the fuel gauge driver during suspend/resume cycles. No direct exploitation or further impact details are provided.
Mitigation Recommendations
A fix is available that replaces cancel_delayed_work() with cancel_delayed_work_sync() to properly synchronize work cancellation on suspend. Users should apply the updated Linux kernel version containing this fix. No other mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5fpq-2c4w-2f7x
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-89461"]
Threat ID: 6aa4a02155bf5e2cf5a8699e
Added to database: 09/12/2026, 00:43:13 UTC
Last enriched: 09/12/2026, 01:16:07 UTC
Last updated: 09/12/2026, 02:01:17 UTC
Views: 3
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