CVE-2024-38635 soundwire: cadence: fix invalid PDI offset
An out-of-bounds read in the Linux kernel soundwire driver allows attackers to potentially disclose memory or cause 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-2024-38635?
CVE-2024-38635 is a high-severity memory corruption vulnerability in Linux kernel, published on 21 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:
soundwire: cadence: fix invalid PDI offset
For some reason, we add an offset to the PDI, presumably to skip the PDI0 and PDI1 which are reserved for BPT.
This code is however completely wrong and leads to an out-of-bounds access. We were just lucky so far since we used only a couple of PDIs and remained within the PDI array bounds.
A Fixes: tag is not provided since there are no known platforms where the out-of-bounds would be accessed, and the initial code had problems as well.
A follow-up patch completely removes this useless offset.
Weakness: CWE-125
Which versions are affected by CVE-2024-38635?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-38635?
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-2024-38635 being exploited?
There is no known exploitation of CVE-2024-38635 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-87128, BELL-CVE-2024-38635, DEBIAN-CVE-2024-38635, GHSA-fgg4-8h2g-hcc2, UBUNTU-CVE-2024-38635.