CVE-2023-53059 platform/chrome: cros_ec_chardev: fix kernel data leak from ioctl
A local attacker can read uninitialized kernel memory by providing a large input size in Chrome OS EC host commands, potentially exposing sensitive data.
- 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-2023-53059?
CVE-2023-53059 is a high-severity vulnerability in Linux kernel, published on 2 May 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:
platform/chrome: cros_ec_chardev: fix kernel data leak from ioctl
It is possible to peep kernel page's data by providing larger `insize` in struct cros_ec_command[1] when invoking EC host commands.
Fix it by using zeroed memory.
[1]: https://elixir.bootlin.com/linux/v6.2/source/include/linux/platform_data/cros_ec_proto.h#L74
Which versions are affected by CVE-2023-53059?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53059?
Apply the vendor's patch.
Is CVE-2023-53059 being exploited?
There is no known exploitation of CVE-2023-53059 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-53059, DEBIAN-CVE-2023-53059, GHSA-6jxj-r3pv-7wf7, UBUNTU-CVE-2023-53059.