Vulnerability in Kernel: net: bcmgenet: Use stronger register read/writes to assure ordering
Summary
GSD-2022-1002074: net: bcmgenet: Use stronger register read/writes to assure ordering. Affects Kernel versions >= 69d2ea9c798983c4a7157278ec84ff969d1cd8e8, < b26091a02093104259ca64aeca73601e56160d62. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities and services to enable the proper functioning of the system. The bcmgenet driver is responsible for managing the Broadcom Ethernet controller. It allows communication between the network interface and the Kernel. However, a vulnerability has been discovered in the bcmgenet driver that could potentially lead to security issues.
Vulnerability Detail
The vulnerability in the bcmgenet driver arises from the use of weak register read/writes, which may result in incorrect ordering. This could lead to various security risks, such as data corruption, privilege escalation, or denial of service attacks. The vulnerability was introduced in version v4.14 of the Linux Kernel and has been fixed in version v5.10.110 by commit b26091a02093104259ca64aeca73601e56160d62.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can apply the following code changes to strengthen the register read/writes in the bcmgenet driver:
// Original code
readl_relaxed(reg);
// Updated code
readl(reg);
Conclusion
In conclusion, a vulnerability has been identified in the bcmgenet driver of the Linux Kernel, which could result in security risks such as data corruption or privilege escalation. It is crucial to update the Kernel to the fixed version or apply the provided workaround to mitigate the vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The vulnerability could potentially lead to data corruption, privilege escalation, or denial of service attacks.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and it will provide real-time alerts for open-source vulnerabilities.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the recommended fixes to ensure the security of your system.
The recommended workaround is to update the Linux Kernel to the fixed version. However, if updating is not feasible, applying the code changes mentioned in the workaround section can provide temporary mitigation.
For more details about this vulnerability, you can refer to the vulnerability report in the GSD database at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1002xxx/GSD-2022-1002074.json.
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