CVE-2023-52457 serial: 8250: omap: Don't skip resource freeing if pm_runtime_resume_and_get() failed
A use-after-free vulnerability in the Linux kernel's 8250 OMAP serial driver allows attackers to potentially execute code or cause a denial of service.
- 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-2023-52457?
CVE-2023-52457 is a high-severity use after free vulnerability in Linux kernel, published on 23 Feb 2024. 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:
serial: 8250: omap: Don't skip resource freeing if pm_runtime_resume_and_get() failed
Returning an error code from .remove() makes the driver core emit the little helpful error message:
remove callback returned a non-zero value. This will be ignored.
and then remove the device anyhow. So all resources that were not freed are leaked in this case. Skipping serial8250_unregister_port() has the potential to keep enough of the UART around to trigger a use-after-free.
So replace the error return (and with it the little helpful error message) by a more useful error message and continue to cleanup.
Weakness: CWE-416
Which versions are affected by CVE-2023-52457?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52457?
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-2023-52457 being exploited?
There is no known exploitation of CVE-2023-52457 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52457, DEBIAN-CVE-2023-52457, GHSA-9xmv-37c3-q98h, UBUNTU-CVE-2023-52457.