CVE-2021-38300
HIGHCVSS 7.8/10EPSS 0.58%
Last modified
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/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-38300?
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.
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-38295In Apache CouchDB, a malicious user with permission to creat…7.3
- CVE-2021-38296Apache Spark supports end-to-end encryption of RPC connectio…7.5
- CVE-2021-38297Go before 1.16.9 and 1.17.x before 1.17.2 has a Buffer Overf…9.8
- CVE-2021-38298Zoho ManageEngine ADManager Plus before 7110 is vulnerable t…9.8
- CVE-2021-38299Webauthn Framework 3.3.x before 3.3.4 has Incorrect Access C…9.8
- CVE-2021-3830btcpayserver is vulnerable to Improper Neutralization of Inp…5.4
- CVE-2021-38302The Newsletter extension through 4.0.0 for TYPO3 allows SQL …9.8
- CVE-2021-38303A SQL injection vulnerability exists in Sureline SUREedge Mi…9.8
- CVE-2021-38304Improper input validation in the National Instruments NI-PAL…7.8
- CVE-2021-3830523andMe Yamale before 3.0.8 allows remote attackers to execu…7.8
- CVE-2021-38306Network Attached Storage on LG N1T1*** 10124 devices allows …9.8
- CVE-2021-3831gnuboard5 is vulnerable to Improper Neutralization of Input …6.1
Are you affected by CVE-2021-38300?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST