CVE-2026-89461 power: supply: max17040: synchronize work cancellation on suspend
A race condition in the Linux kernel max17040 driver during system suspend can cause denial of service by allowing polling callbacks to access hardware after suspension.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89461?
CVE-2026-89461 is a vulnerability in Linux, published on 11 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
power: supply: max17040: synchronize work cancellation on suspend
max17040_work() requeues itself after every poll. cancel_delayed_work() only cancels a pending instance and does not wait for a callback that is already running.
If system suspend races with the polling callback, the callback can continue accessing the fuel gauge and requeue itself after the suspend callback returns.
Use cancel_delayed_work_sync() to ensure polling is quiesced before suspend completes.
Which versions are affected by CVE-2026-89461?
How do I fix CVE-2026-89461?
Apply the vendor's patch.
Is CVE-2026-89461 being exploited?
There is no known exploitation of CVE-2026-89461 in the wild and no public exploit code.
Sources
Also known as AZL-100560, BELL-CVE-2026-89461, DEBIAN-CVE-2026-89461, GHSA-5fpq-2c4w-2f7x, UBUNTU-CVE-2026-89461.