#VU90233 Use-after-free in Linux kernel - CVE-2021-47100
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90233
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2021-47100
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the cleanup_bmc_device() function in drivers/char/ipmi/ipmi_msghandler.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/925229d552724e1bba1abf01d3a0b1318539b012
- https://git.kernel.org/stable/c/992649b8b16843d27eb39ceea5f9cf85ffb50a18
- https://git.kernel.org/stable/c/6809da5185141e61401da5b01896b79a4deed1ad
- https://git.kernel.org/stable/c/6b3f7e4b10f343f05b5fb513b07a9168fbf1172e
- https://git.kernel.org/stable/c/ffb76a86f8096a8206be03b14adda6092e18e275
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.223
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.89
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.12
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.169