What’s Vulnerable › Vulnerabilities

CVE-2023-6039: Kernel: use-after-free in drivers/net/usb/lan78xx.c in lan78xx_disconnect

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-09 · updated 2026-06-17
• Weakness: CWE-416

Description

A use-after-free flaw was found in lan78xx_disconnect in drivers/net/usb/lan78xx.c in the network sub-component, net/usb/lan78xx in the Linux Kernel. This flaw allows a local attacker to crash the system when the LAN78XX USB device detaches.

Affected products

• Linux kernel: before 6.5; 6.5-rc1, 6.5-rc2, 6.5-rc3, 6.5-rc4 — fixed in 6.5

How to fix

Upgrade to a fixed version: Linux kernel 6.5. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2023-6039
• https://bugzilla.redhat.com/show_bug.cgi?id=2248755
• https://github.com/torvalds/linux/commit/1e7417c188d0a83fb385ba2dbe35fd2563f2b6f3
• https://access.redhat.com/security/cve/CVE-2023-6039
• https://bugzilla.redhat.com/show_bug.cgi?id=2248755
• https://github.com/torvalds/linux/commit/1e7417c188d0a83fb385ba2dbe35fd2563f2b6f3

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