Vulnerability in Kernel Package: mm, slub: fix mismatch between reconstructed freelist depth and cnt
Summary
GSD-2021-1001874: mm, slub: fix mismatch between reconstructed freelist depth and cnt. Affects Kernel versions >= c3895391df385c6628638f014c87e16f5e2efd45, < ec93d4a439c3a619b6682ba5778dc885d1460d3e. No fix is published. How to fix ↓
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Background
The Kernel package is a crucial component of the Linux operating system, responsible for managing system resources and providing an interface between hardware and software. It plays a vital role in the overall functionality and stability of the system. The specific vulnerability in focus relates to the mm (memory management) subsystem and the slub allocator. The slub allocator is responsible for managing kernel memory allocations and deallocations. However, a mismatch between the reconstructed freelist depth and the cnt value can occur, leading to potential security vulnerabilities.
Vulnerability Detail
The vulnerability arises due to a mismatch between the reconstructed freelist depth and the cnt value in the mm, slub allocator. This mismatch can be exploited by malicious actors to trigger memory corruption or other security issues. The impact of this vulnerability can vary, depending on the specific use case and the attacker's capabilities. However, it has the potential to lead to privilege escalation, denial of service, or arbitrary code execution. The vulnerability was introduced in version v4.17 of the Linux Kernel and has been fixed in version v5.14.15.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability. It is advised to apply the recommended fix by updating the Linux Kernel to the patched version.
Conclusion
In conclusion, the vulnerability in the Kernel package, specifically in the mm, slub allocator, can result in memory corruption and other security issues. It is crucial to update the Linux Kernel to version v5.14.15 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can vary, but it has the potential to lead to privilege escalation, denial of service, or arbitrary code execution.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) to the playground, and it will provide real-time alerts for open-source vulnerabilities, including this one.
No specific workaround has been provided for this vulnerability. It is recommended to update the Linux Kernel to the patched version.
The vulnerability was introduced in version v4.17 of the Linux Kernel. All versions between v4.17 and v5.14.14 are affected. It has been fixed in version v5.14.15.
You can find more information about this vulnerability, including the technical details and the fix, in the vulnerability report available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001874.json
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