What is CVE-2021-38207?

CVE-2021-38207 is a high-severity vulnerability in Linux Kernel, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2021-08-08.

How severe is CVE-2021-38207?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Linux Kernel

CVE-2021-38207

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.

Vulnerability class: Buffer Overflow

Published 2021-08-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.034 (88.3th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Linux Kernel

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13 (Patch, Mailing List, Vendor Advisory)
github.com/torvalds/linux/commit/c364df2489b8ef2f5e3159b1dff1ff1fdb16040d (Patch, Third Party Advisory)
security.netapp.com/advisory/ntap-20210902-0007/ (Third Party Advisory)

Frequently asked questions

What is CVE-2021-38207?: CVE-2021-38207 is a high-severity vulnerability in Linux Kernel, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2021-08-08.
How severe is CVE-2021-38207?: High severity. CVSS v3 base score is 7.5 out of 10.