CVE-2021-38207 Denial of service in n/a

What is CVE-2021-38207?

CVE-2021-38207 is a high-severity denial of service vulnerability in Linux kernel, published on 8 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

drivers/net/ethernet/xilinx/ll_temac_main.c in the Linux kernel before 5.12.13 allows remote attackers to cause a denial of service (buffer overflow and lockup) by sending heavy network traffic for about ten minutes.

Weakness: CWE-120

Which versions are affected by CVE-2021-38207?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2021-38207?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-38207 being exploited?

There is no known exploitation of CVE-2021-38207 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
• GitHub advisory
• How this page is made

Also known as AZL-6591, DEBIAN-CVE-2021-38207, GHSA-j3wf-j468-mv27, UBUNTU-CVE-2021-38207.