CVE-2021-38300 : arch/mips/net/bpf_jit.c in the Linux kernel before 5.4.10 can generate undesirab

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.

Published 2021-09-20 06:15:07

Updated 2023-03-01 20:15:51

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2021-38300

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 10.0
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Matching versions
Linux » Linux Kernel
Versions from including (>=) 4.15 and before (<) 4.19.211
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions
Linux » Linux Kernel
Versions from including (>=) 5.11 and before (<) 5.14.10
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions
Linux » Linux Kernel
Versions from including (>=) 5.5 and before (<) 5.10.71
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions
Linux » Linux Kernel
Versions from including (>=) 3.16 and before (<) 4.14.251
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions
Linux » Linux Kernel
Versions from including (>=) 4.20 and before (<) 5.4.153
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions
Netapp » Cloud Backup » Version: N/A
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
Matching versions
Netapp » H410c Firmware » Version: N/A
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H410c » Version: N/A
Netapp » H300s Firmware » Version: N/A
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H300s » Version: N/A
Netapp » H500s Firmware » Version: N/A
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H500s » Version: N/A
Netapp » H700s Firmware » Version: N/A
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H700s » Version: N/A
Netapp » H300e Firmware » Version: N/A
cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H300e » Version: N/A
Netapp » H500e Firmware » Version: N/A
cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H500e » Version: N/A
Netapp » H700e Firmware » Version: N/A
cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H700e » Version: N/A
Netapp » H410s Firmware » Version: N/A
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H410s » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-38300

EPSS FAQ

0.03%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 5 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-38300

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.2	HIGH	AV:L/AC:L/Au:N/C:C/I:C/A:C	3.9	10.0	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

References for CVE-2021-38300

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10

Mailing List;Vendor Advisory
https://www.debian.org/security/2022/dsa-5096

Debian -- Security Information -- DSA-5096-1 linux
Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html

[SECURITY] [DLA 2941-1] linux-4.19 security update
Third Party Advisory

CVEs referencing this url
https://security.netapp.com/advisory/ntap-20211008-0003/

CVE-2021-38300 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=37cb28ec7d3a36a5bace7063a3dba633ab110f8b

kernel/git/torvalds/linux.git - Linux kernel source tree
Exploit;Mailing List;Patch;Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/09/15/5

oss-security - [CVE-2021-38300] Linux kernel cBPF JIT compiler for MIPS emits incorrect branches leading to execution of arbitrary Kernel code
Mailing List;Patch;Third Party Advisory

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Vulnerability Details : CVE-2021-38300

Products affected by CVE-2021-38300

Exploit prediction scoring system (EPSS) score for CVE-2021-38300

CVSS scores for CVE-2021-38300

References for CVE-2021-38300