CVE-2025-68819 media: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg()
A missing bounds check in the dtv5100 USB driver allows out-of-bounds memory access, potentially leading to code execution or system crashes.
- 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-2025-68819?
CVE-2025-68819 is a high-severity memory corruption vulnerability in Linux, published on 13 Jan 2026. 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: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg()
rlen value is a user-controlled value, but dtv5100_i2c_msg() does not check the size of the rlen value. Therefore, if it is set to a value larger than sizeof(st->data), an out-of-bounds vuln occurs for st->data.
Therefore, we need to add proper range checking to prevent this vuln.
Weakness: CWE-787
Which versions are affected by CVE-2025-68819?
How do I fix CVE-2025-68819?
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-2025-68819 being exploited?
There is no known exploitation of CVE-2025-68819 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2025-68819, DEBIAN-CVE-2025-68819, GHSA-7rq6-3vvj-vpcc, ROOT-OS-DEBIAN-11-CVE-2025-68819, ROOT-OS-DEBIAN-12-CVE-2025-68819, ROOT-OS-DEBIAN-13-CVE-2025-68819 and 3 more.