CVE-2023-53724 mfd: pcf50633-adc: Fix potential memleak in pcf50633_adc_async_read()
A memory leak in the Linux kernel PCF50633 ADC driver allows local attackers to cause resource exhaustion and denial of service.
- 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-2023-53724?
CVE-2023-53724 is a memory corruption vulnerability in Linux, published on 22 Oct 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:
mfd: pcf50633-adc: Fix potential memleak in pcf50633_adc_async_read()
`req` is allocated in pcf50633_adc_async_read(), but adc_enqueue_request() could fail to insert the `req` into queue. We need to check the return value and free it in the case of failure.
Which versions are affected by CVE-2023-53724?
How do I fix CVE-2023-53724?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-53724 being exploited?
There is no known exploitation of CVE-2023-53724 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-53724, DEBIAN-CVE-2023-53724, GHSA-j7q4-rfmc-c75r, UBUNTU-CVE-2023-53724.