CVE-2021-38300

Public Exploit

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.

7.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.03%

Vendor Advisory debian.org Vendor Advisory kernel.org Vendor Advisory kernel.org

Affected: n/a n/a

References

Link	Tags
http://www.openwall.com/lists/oss-security/2021/09/15/5	mailing list third party advisory patch
https://security.netapp.com/advisory/ntap-20211008-0003/	third party advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=37cb28ec7d3a36a5bace7063a3dba633ab110f8b	mailing list patch vendor advisory exploit
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10	mailing list vendor advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html	third party advisory mailing list
https://www.debian.org/security/2022/dsa-5096	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-38300?: CVE-2021-38300 has been scored as a high severity vulnerability.
How to fix CVE-2021-38300?: To fix CVE-2021-38300, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-38300 being actively exploited in the wild?: It is possible that CVE-2021-38300 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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