HOMEVULNERABILITIESCVE-2021-38300
HIGH

CVE-2021-38300

NVD-CWE-noinfoPublished: September 20, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-38300 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
Linux1 product(s)
linux kernel
netapp17 product(s)
cloud backuph410c firmwareh410ch300s firmwareh300sh500s firmwareh500sh700s firmwareh700sh300e firmwareh300eh500e firmware+5
Source: NVD CPE · 20 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openwall.com/lists/oss-security/2021/09/15/5
PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=37cb28ec7d3a36a5bace7063a3dba633ab110f8b
PATCHhttp://www.openwall.com/lists/oss-security/2021/09/15/5
PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=37cb28ec7d3a36a5bace7063a3dba633ab110f8b
ADVISORYhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20211008-0003/
ADVISORYhttps://www.debian.org/security/2022/dsa-5096
ADVISORYhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20211008-0003/
ADVISORYhttps://www.debian.org/security/2022/dsa-5096

All References (12)

→
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

Quick Facts

CVE IDCVE-2021-38300
CVSS Score7.8 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected3 vendor(s)
PublishedSep 20, 2021

Related CVEs (NVD-CWE-noinfo)

CVE-2021-2256
10.0
CVE-2021-2317
10.0
CVE-2021-2244
10.0
CVE-2021-2248
10.0
CVE-2021-2177
10.0
CVE-2016-20010
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-38300 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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