#VU90302 Out-of-bounds read in Linux kernel - CVE-2021-47393
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90302
Vulnerability risk: Low
CVSSv4.0: 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-2021-47393
CWE-ID: CWE-125
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 perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the mlxreg_fan_set_cur_state() function in drivers/hwmon/mlxreg-fan.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/5c6e0bce647d9cb32a17d58ffa669b3421fcc6ca
- https://git.kernel.org/stable/c/a6c42ae1530f94724d3c42cf91fe3d3c5e394f8a
- https://git.kernel.org/stable/c/76bbb482d33bfcd7e9070ecf594c9ec73e01c930
- https://git.kernel.org/stable/c/aa85fb7bde558bb2e364e85976b14b259c8b6fe8
- https://git.kernel.org/stable/c/e6fab7af6ba1bc77c78713a83876f60ca7a4a064
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.209
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.71
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.151