CVE-2021-38300

Name: CVE-2021-38300
Creator: NVD / NIST
Published: 2021-09-20T06:15:06.623+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.58%

Last modified Jun 17, 2026

CVE-2021-38300 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. arch/mips/net/bpf_jit.c in the Linux kernel before 5.4.10 can generate undesirable machine code when transforming unprivileged cBPF programs, allowing execution of arbitrary code within the kernel context. This occurs because conditional branches can exceed the 128 KB limit of the MIPS architecture.. EPSS estimates a 0.58% chance of exploitation in the next 30 days.

Description

arch/mips/net/bpf_jit.c in the Linux kernel before 5.4.10 can generate undesirable machine code when transforming unprivileged cBPF programs, allowing execution of arbitrary code within the kernel context. This occurs because conditional branches can exceed the 128 KB limit of the MIPS architecture.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.58%

43.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 3.16, < 4.14.251
Linux	Linux Kernel	>= 4.15, < 4.19.211
Linux	Linux Kernel	>= 4.20, < 5.4.153
Linux	Linux Kernel	>= 5.5, < 5.10.71
Linux	Linux Kernel	>= 5.11, < 5.14.10
Netapp	Cloud Backup	All versions
Netapp	H410c Firmware	All versions
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H300e Firmware	All versions
Netapp	H500e Firmware	All versions
Netapp	H700e Firmware	All versions
Netapp	H410s Firmware	All versions
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

http://www.openwall.com/lists/oss-security/2021/09/15/5Mailing List, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10Mailing List, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=37cb28ec7d3a36a5bace7063a3dba633ab110f8bExploit, Mailing List, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlThird Party Advisory
https://security.netapp.com/advisory/ntap-20211008-0003/Third Party Advisory
https://www.debian.org/security/2022/dsa-5096Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/15/5Mailing List, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10Mailing List, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=37cb28ec7d3a36a5bace7063a3dba633ab110f8bExploit, Mailing List, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlThird Party Advisory
https://security.netapp.com/advisory/ntap-20211008-0003/Third Party Advisory
https://www.debian.org/security/2022/dsa-5096Third Party Advisory

Timeline

Published: Sep 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-38300?

How severe is CVE-2021-38300?

CVE-2021-38300 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.58% probability of exploitation in the next 30 days.

How do I fix CVE-2021-38300?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-38300?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST