CVE-2021-0512: 
Linux Kernel vulnerability analysis and mitigation

CVE-2021-0512 is a vulnerability discovered in the Linux kernel's HID subsystem, specifically in the _hidinputchangeresolutionmultipliers function of hid-input.c. The vulnerability was disclosed on June 21, 2021, and affects various Linux kernel versions. This security flaw involves an out-of-bounds write condition due to a heap buffer overflow (NVD, Ubuntu).

The vulnerability exists in the _hidinputchangeresolutionmultipliers function within the hid-input.c file of the Linux kernel HID subsystem. It manifests as a possible out-of-bounds write due to a heap buffer overflow. The issue has been assigned a CVSS 3 Severity Score of 7.8 (High), indicating its significant security impact (Ubuntu).

This vulnerability could lead to local escalation of privilege with no additional execution privileges needed for exploitation. User interaction is not required for exploitation, making it particularly concerning for system security (Ubuntu).

Multiple Linux distributions have released patches to address this vulnerability. Red Hat has provided updates for affected versions of Red Hat Enterprise Linux, including kernel live patch modules. Ubuntu has also released fixes for affected versions, including updates for various kernel packages (RHSA-2021:3443, Ubuntu).