CVE-2022-49186 clk: visconti: prevent array overflow in visconti_clk_register_gates()
An integer overflow in the Linux kernel clock driver causes an out-of-bounds memory access, potentially leading to a system crash.
- 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-2022-49186?
CVE-2022-49186 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:
clk: visconti: prevent array overflow in visconti_clk_register_gates()
This code was using -1 to represent that there was no reset function. Unfortunately, the -1 was stored in u8 so the if (clks[i].rs_id >= 0) condition was always true. This lead to an out of bounds access in visconti_clk_register_gates().
Weakness: CWE-129
Which versions are affected by CVE-2022-49186?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49186?
Apply the vendor's patch.
Is CVE-2022-49186 being exploited?
There is no known exploitation of CVE-2022-49186 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49186, GHSA-q656-wcrg-wwx4, UBUNTU-CVE-2022-49186.