CVE-2022-49289 uaccess: fix integer overflow on access_ok()
An integer overflow in the Linux kernel's access_ok() function allows bypassing user access checks, potentially leading to unauthorized memory access.
- 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-2022-49289?
CVE-2022-49289 is a high-severity vulnerability in Linux kernel, published on 26 Feb 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:
uaccess: fix integer overflow on access_ok()
Three architectures check the end of a user access against the address limit without taking a possible overflow into account. Passing a negative length or another overflow in here returns success when it should not.
Use the most common correct implementation here, which optimizes for a constant 'size' argument, and turns the common case into a single comparison.
Weakness: CWE-190
Which versions are affected by CVE-2022-49289?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49289?
Apply the vendor's patch.
Is CVE-2022-49289 being exploited?
There is no known exploitation of CVE-2022-49289 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49289, GHSA-vfhm-mc4c-75c8, ROOT-OS-DEBIAN-11-CVE-2022-49289, UBUNTU-CVE-2022-49289.