CVE-2022-49478 media: pvrusb2: fix array-index-out-of-bounds in pvr2_i2c_core_init
A missing validation check in the Linux kernel pvrusb2 driver allows an out-of-bounds array index, potentially causing a denial of service.
- 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-2022-49478?
CVE-2022-49478 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:
media: pvrusb2: fix array-index-out-of-bounds in pvr2_i2c_core_init
Syzbot reported that -1 is used as array index. The problem was in missing validation check.
hdw->unit_number is initialized with -1 and then if init table walk fails this value remains unchanged. Since code blindly uses this member for array indexing adding sanity check is the easiest fix for that.
hdw->workpoll initialization moved upper to prevent warning in __flush_work.
Weakness: CWE-129
Which versions are affected by CVE-2022-49478?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49478?
Apply the vendor's patch.
Is CVE-2022-49478 being exploited?
There is no known exploitation of CVE-2022-49478 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49478, GHSA-jgh8-6hmw-5f93, UBUNTU-CVE-2022-49478.