CVE-2023-54314 media: af9005: Fix null-ptr-deref in af9005_i2c_xfer
A local attacker can cause a kernel crash in the af9005 media driver by sending crafted I2C messages with null buffers and zero length.
- 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-2023-54314?
CVE-2023-54314 is a 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: af9005: Fix null-ptr-deref in af9005_i2c_xfer
In af9005_i2c_xfer, msg is controlled by user. When msg[i].buf is null and msg[i].len is zero, former checks on msg[i].buf would be passed. Malicious data finally reach af9005_i2c_xfer. If accessing msg[i].buf[0] without sanity check, null ptr deref would happen. We add check on msg[i].len to prevent crash.
Similar commit: commit 0ed554fd769a ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()")
Which versions are affected by CVE-2023-54314?
How do I fix CVE-2023-54314?
Apply the vendor's patch.
Is CVE-2023-54314 being exploited?
There is no known exploitation of CVE-2023-54314 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54314, DEBIAN-CVE-2023-54314, GHSA-hrq7-rg66-qqxv, UBUNTU-CVE-2023-54314.