Out-of-bounds read in Linux kernel mhi core driver



| Updated: 2025-05-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-47286
CWE-ID CWE-125
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Out-of-bounds read

EUVDB-ID: #VU91089

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-47286

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the mhi_process_cmd_completion() function in drivers/bus/mhi/core/main.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.10 - 5.14 rc7

CPE2.3 External links

https://git.kernel.org/stable/c/3efec3b4b16fc7af25676a94230a8ab2a3bb867c
https://git.kernel.org/stable/c/aed4f5b51aba41e2afd7cfda20a0571a6a67dfe9
https://git.kernel.org/stable/c/546362a9ef2ef40b57c6605f14e88ced507f8dd0
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.54
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.6
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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