Shift-out-of-bound Vulnerability in nvmem Package
Summary
UVI-2021-1001932: nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells. Affects Kernel versions >= 69aba7948cbe53f2f1827e84e9dd0ae470a5072e, < 60df06bbdf497e37ed25ad40572c362e5b0998df. No fix is published. How to fix ↓
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Background
The nvmem package is a component of the Linux Kernel ecosystem. It provides an interface for accessing non-volatile memory (NVM) devices. NVM is used to store data that needs to persist even when the power is turned off. The nvmem package allows applications to read from and write to NVM devices. It supports various types of NVM cells, including byte size cells.
Vulnerability Detail
The identified vulnerability in the nvmem package is a shift-out-of-bound issue. This vulnerability occurs when performing shift operations on byte size cells. The vulnerability was introduced in version v4.3 of the Linux Kernel by commit 69aba7948cbe53f2f1827e84e9dd0ae470a5072e and affects all subsequent versions until v4.9.288. The impact and attack plausibility of this vulnerability have not been proven yet. However, if exploited, it could lead to undefined behavior and potential security risks.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The shift-out-of-bound vulnerability in the nvmem package can be fixed by updating the Linux Kernel to version v4.9.288 or later. Users are advised to follow the update process specific to their Linux distribution. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The nvmem package is a component of the Linux Kernel ecosystem that provides an interface for accessing non-volatile memory (NVM) devices.
Non-volatile memory (NVM) is a type of computer memory that can retain stored information even when the power is turned off.
The nvmem package supports various types of NVM cells, including byte size cells.
The impact of the shift-out-of-bound vulnerability in the nvmem package is currently unknown. It could potentially lead to undefined behavior and security risks if exploited.
To fix the shift-out-of-bound vulnerability, users should update their Linux Kernel to version v4.9.288 or later, which includes the fix for this vulnerability.
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