CVE-2021-47547 net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound

What is CVE-2021-47547?

CVE-2021-47547 is a medium-severity vulnerability in Linux kernel, published on 24 May 2024. 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: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound

In line 5001, if all id in the array 'lp->phy[8]' is not 0, when the 'for' end, the 'k' is 8.

At this time, the array 'lp->phy[8]' may be out of bound.

Weakness: CWE-129

Which versions are affected by CVE-2021-47547?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2021-47547?

Apply the vendor's patch.

Is CVE-2021-47547 being exploited?

There is no known exploitation of CVE-2021-47547 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• How this page is made

Also known as DEBIAN-CVE-2021-47547, UBUNTU-CVE-2021-47547.