What’s Vulnerable › Vulnerabilities

CVE-2023-53068: net: usb: lan78xx: Limit packet length to skb->len

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-02 · updated 2026-06-17
• Weakness: CWE-401

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.

Affected products

• Linux kernel: from 4.3 before 6.1.22; from 6.2 before 6.2.9; 6.3-rc1, 6.3-rc2, 6.3-rc3 — fixed in 6.1.22, 6.2.9

How to fix

Upgrade to a fixed version: Linux kernel 6.1.22, 6.2.9. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/44b9ed73369fc5ec85dd2ee487e986301792a82d
• https://git.kernel.org/stable/c/7f247f5a2c18b3f21206cdd51193df4f38e1b9f5
• https://git.kernel.org/stable/c/83de34967473ed31d276381373713cc2869a42e5

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