#VU90356 Out-of-bounds read in Linux kernel - CVE-2021-46980
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90356
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-2021-46980
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 ucsi_unregister_altmodes(), ucsi_get_pdos() and ucsi_pwr_opmode_change() functions in drivers/usb/typec/ucsi/ucsi.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/e5366bea0277425e1868ba20eeb27c879d5a6e2d
- https://git.kernel.org/stable/c/a453bfd7ef15fd9d524004d3ca7b05353a302911
- https://git.kernel.org/stable/c/5e9c6f58b01e6fdfbc740390c01f542a35c97e57
- https://git.kernel.org/stable/c/1f4642b72be79757f050924a9b9673b6a02034bc
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.38
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.22
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13