CVE-2023-54284 media: av7110: prevent underflow in write_ts_to_decoder()
A missing bounds check in the av7110 media driver allows an integer underflow, potentially leading to 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-2023-54284?
CVE-2023-54284 is a high-severity vulnerability in Linux, published on 30 Dec 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: av7110: prevent underflow in write_ts_to_decoder()
The buf[4] value comes from the user via ts_play(). It is a value in the u8 range. The final length we pass to av7110_ipack_instant_repack() is "len - (buf[4] + 1) - 4" so add a check to ensure that the length is not negative. It's not clear that passing a negative len value does anything bad necessarily, but it's not best practice.
With the new bounds checking the "if (!len)" condition is no longer possible or required so remove that.
Which versions are affected by CVE-2023-54284?
How do I fix CVE-2023-54284?
Apply the vendor's patch.
Is CVE-2023-54284 being exploited?
There is no known exploitation of CVE-2023-54284 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54284, DEBIAN-CVE-2023-54284, GHSA-rj9v-3cx4-5wvc, UBUNTU-CVE-2023-54284.