CVE-2026-53308 power: supply: max77705: Free allocated workqueue and fix removal order
A use-after-free vulnerability in the Linux kernel max77705 power supply driver allows attackers to cause memory corruption or system crashes via race conditions during device removal.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53308?
CVE-2026-53308 is a medium-severity use after free vulnerability in Linux kernel, published on 26 Jun 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: max77705: Free allocated workqueue and fix removal order
Use devm interface for allocating workqueue to fix two bugs at the same time:
1. Driver leaks the memory on remove(), because the workqueue is not destroyed.
2. Driver allocates workqueue and then registers interrupt handlers with devm interface. This means that probe error paths will not use a reversed order, but first destroy the workqueue and then, via devm release handlers, free the interrupt.
The interrupt handler schedules work on this exact workqueue, thus if interrupt is hit in this short time window - after destroying workqueue, but before devm() frees the interrupt - the schedulled work will lead to use of freed memory.
Change is not equivalent in the workqueue itself: use non-legacy API which does not set (__WQ_LEGACY | WQ_MEM_RECLAIM). The workqueue is used to update power supply (power_supply_changed()) status, thus there is no point to run it for memory reclaim. Note that dev_name() is not directly used in second argument to prevent possible unlikely parsing any "%" character in device name as format.
Weakness: CWE-401
Which versions are affected by CVE-2026-53308?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53308?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-53308 being exploited?
There is no known exploitation of CVE-2026-53308 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-53308, DEBIAN-CVE-2026-53308, GHSA-2vjf-7vmh-8jpp, UBUNTU-CVE-2026-53308.