CVE-2023-53068 net: usb: lan78xx: Limit packet length to skb->len
A flaw in the Linux kernel's lan78xx USB driver allows attackers to leak kernel memory contents by sending crafted packets with oversized length descriptors.
- 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-2023-53068?
CVE-2023-53068 is a medium-severity vulnerability in Linux kernel, published on 2 May 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:
net: usb: lan78xx: Limit packet length to skb->len
Packet length retrieved from descriptor may be larger than the actual socket buffer length. In such case the cloned skb passed up the network stack will leak kernel memory contents.
Additionally prevent integer underflow when size is less than ETH_FCS_LEN.
Weakness: CWE-401
Which versions are affected by CVE-2023-53068?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53068?
Apply the vendor's patch.
Is CVE-2023-53068 being exploited?
There is no known exploitation of CVE-2023-53068 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-70126, BELL-CVE-2023-53068, DEBIAN-CVE-2023-53068, GHSA-rhwj-4j44-629j, ROOT-OS-DEBIAN-11-CVE-2023-53068, ROOT-OS-UBUNTU-2204-CVE-2023-53068 and 1 more.