CVE-2024-38587 speakup: Fix sizeof() vs ARRAY_SIZE() bug
A buffer overflow in the Linux kernel speakup driver allows attackers to cause memory corruption, potentially leading to system crashes or arbitrary code execution.
- 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-2024-38587?
CVE-2024-38587 is a high-severity memory corruption vulnerability in Linux kernel, published on 19 Jun 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:
speakup: Fix sizeof() vs ARRAY_SIZE() bug
The "buf" pointer is an array of u16 values. This code should be using ARRAY_SIZE() (which is 256) instead of sizeof() (which is 512), otherwise it can the still got out of bounds.
Weakness: CWE-129
Which versions are affected by CVE-2024-38587?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-38587?
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-2024-38587 being exploited?
There is no known exploitation of CVE-2024-38587 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-38587, DEBIAN-CVE-2024-38587, GHSA-6w85-2w93-mrpr, UBUNTU-CVE-2024-38587.