CVE-2022-2873 : Security Advisory and Response
Learn about CVE-2022-2873, an out-of-bounds memory access flaw in the Linux kernel Intel’s iSMT SMBus host controller driver, allowing a local user to crash the system. Find out the impact, affected systems, and mitigation steps.
An out-of-bounds memory access flaw in the Linux kernel Intel’s iSMT SMBus host controller driver allows a local user to crash the system.
Understanding CVE-2022-2873
This section provides insight into the CVE-2022-2873 vulnerability.
What is CVE-2022-2873?
The vulnerability is identified as an out-of-bounds memory access flaw in the Linux kernel Intel’s iSMT SMBus host controller driver. It occurs when a user triggers the I2C_SMBUS_BLOCK_DATA with malicious input data, enabling a local user to crash the system.
The Impact of CVE-2022-2873
The impact of this vulnerability is significant as it allows a local user to crash the system, potentially resulting in a denial of service (DoS) condition and disruption of normal system operations.
Technical Details of CVE-2022-2873
This section outlines the technical details of CVE-2022-2873.
Vulnerability Description
The flaw is present in the way a user interacts with the I2C_SMBUS_BLOCK_DATA using malicious data, leading to out-of-bounds memory access in the Linux kernel Intel’s iSMT SMBus host controller driver.
Affected Systems and Versions
The vulnerability affects Linux kernel version 5.19-rc8.
Exploitation Mechanism
The exploitation of this vulnerability requires local access to the system and the ability to trigger the specific ioctl I2C_SMBUS block data with crafted input.
Mitigation and Prevention
Understanding how to mitigate and prevent CVE-2022-2873 is crucial for maintaining system security.
Immediate Steps to Take
- Apply relevant security patches or updates provided by the Linux kernel maintainers.
- Restrict access to untrusted users to minimize the risk of exploitation.
Long-Term Security Practices
- Regularly update the system with the latest security patches to protect against known vulnerabilities.
- Implement least privilege access controls to limit the impact of potential security breaches.
Patching and Updates
Stay informed about security advisories and updates released by Linux kernel providers to address vulnerabilities like CVE-2022-2873.