Use-after-free in Linux kernel - CVE-2021-47278

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Main Vulnerability Database Vulnerabilities #VU90093

Use-after-free in Linux kernel - CVE-2021-47278

Published: May 31, 2024 / Updated: May 14, 2025


Vulnerability identifier: #VU90093
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-47278
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the mhi_pci_remove() function in drivers/bus/mhi/pci_generic.c. A local user can escalate privileges on the system.


Affected software

Linux kernel
IBM Security Guardium

How to mitigate CVE-2021-47278

Install update from vendor's website.

Linux kernel - addressed in versions 5.12.11, 5.13
IBM Security Guardium - addressed in versions 12.0p31, 12.0p106

External References

Related Security Bulletins