CVE-2023-54079 power: supply: bq27xxx: Fix poll_interval handling and races on remove

What is CVE-2023-54079?

CVE-2023-54079 is a high-severity vulnerability in Linux, published on 24 Dec 2025. 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: bq27xxx: Fix poll_interval handling and races on remove

Before this patch bq27xxx_battery_teardown() was setting poll_interval = 0 to avoid bq27xxx_battery_update() requeuing the delayed_work item.

There are 2 problems with this:

1. If the driver is unbound through sysfs, rather then the module being rmmod-ed, this changes poll_interval unexpectedly

2. This is racy, after it being set poll_interval could be changed before bq27xxx_battery_update() checks it through /sys/module/bq27xxx_battery/parameters/poll_interval

Fix this by added a removed attribute to struct bq27xxx_device_info and using that instead of setting poll_interval to 0.

There also is another poll_interval related race on remove(), writing /sys/module/bq27xxx_battery/parameters/poll_interval will requeue the delayed_work item for all devices on the bq27xxx_battery_devices list and the device being removed was only removed from that list after cancelling the delayed_work item.

Fix this by moving the removal from the bq27xxx_battery_devices list to before cancelling the delayed_work item.

Which versions are affected by CVE-2023-54079?

How do I fix CVE-2023-54079?

Apply the vendor's patch.

Is CVE-2023-54079 being exploited?

There is no known exploitation of CVE-2023-54079 in the wild and no public exploit code.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-54079, DEBIAN-CVE-2023-54079, GHSA-gmfg-4jjj-q47r, UBUNTU-CVE-2023-54079.