CVE-2024-27412: power: supply: bq27xxx-i2c: Do not free non existing IRQ

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-17 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: power: supply: bq27xxx-i2c: Do not free non existing IRQ The bq27xxx i2c-client may not have an IRQ, in which case client->irq will be 0. bq27xxx_battery_i2c_probe() already has an if (client->irq) check wrapping the request_threaded_irq(). But bq27xxx_battery_i2c_remove() unconditionally calls free_irq(client->irq) leading to: [ 190.310742] ------------[ cut here ]------------ [ 190.310843] Trying to free already-free IRQ 0 [ 190.310861] WARNING: CPU: 2 PID: 1304 at kernel/irq/manage.c:1893 free_irq+0x1b8/0x310 Followed by a backtrace when unbinding the driver. Add an if (client->irq) to bq27xxx_battery_i2c_remove() mirroring probe() to fix this.

Affected products

Debian Linux: 10.0
Linux kernel: from 4.14.316 before 4.15; from 4.19.284 before 4.19.309; from 5.4.244 before 5.4.271; from 5.10.181 before 5.10.212; from 5.15.114 before 5.15.151; from 6.1.31 before 6.1.81 — fixed in 4.15, 4.19.309, 5.10.212, 5.15.151, 5.4.271, 6.1.81

How to fix

Upgrade to a fixed version: Linux kernel 4.15, 4.19.309, 5.10.212, 5.15.151. Check the vendor advisory for mitigations.

References

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