net: hso: fix NULL-deref on disconnect regression
Summary
GSD-2021-1000042: net: hso: fix NULL-deref on disconnect regression. Affects Kernel versions >= 388d05f70f1ee0cac4a2068fd295072f1a44152a, < 0f000005da31f6947f843ce6b3e3a960540c6e00. No fix is published. How to fix ↓
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Background
The net package in the Linux Kernel is responsible for handling network-related functionality. It provides various protocols and drivers for network communication. One of the drivers included is the hso driver, which is used for High-Speed Option (HSO) devices. These devices are typically used for mobile broadband connections. The hso driver allows the Linux Kernel to communicate with these devices and establish network connections.
Vulnerability Detail
A vulnerability has been discovered in the hso driver that can lead to a NULL-dereference when disconnecting from a network. This vulnerability was introduced in version v5.11.14 of the Linux Kernel and was fixed in version v5.11.17. When a network disconnect event occurs, the hso driver fails to handle it properly, resulting in a NULL-dereference. An attacker could potentially exploit this vulnerability to crash the system or execute arbitrary code with kernel privileges.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the patch or update the Linux Kernel to the fixed version.
Conclusion
The hso driver in the Linux Kernel is vulnerable to a NULL-dereference issue when disconnecting from a network. This vulnerability can potentially lead to system crashes or arbitrary code execution. It is crucial to update the Linux Kernel to version v5.11.17 or later to mitigate this vulnerability. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can potentially allow an attacker to crash the system or execute arbitrary code with kernel privileges.
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 Vulert will analyze it for any open-source vulnerabilities, including this one.
There are no known instances of this vulnerability being exploited in the wild. However, it is crucial to apply the fix as soon as possible to mitigate any potential risks.
It is not recommended to manually patch the hso driver without updating the entire Linux Kernel. The fix for this vulnerability is included in the updated kernel version, which ensures the proper integration of the patch and overall system stability.
You can find more information about this vulnerability, including the specific commits that introduced and fixed it, in the GSD-2021-1000042.json file available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000042.json.
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