Memory Leak Vulnerability in Linux Kernel - CVE-2019-12379
Summary
DEBIAN-CVE-2019-12379: An issue was discovered in con_insert_unipair in drivers/tty/vt/consolemap.c in the Linux kernel through 5.1.5. Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing hardware resources and providing essential services to applications. It is widely used in various environments, from servers to embedded systems. The kernel's stability and security are paramount, as vulnerabilities can lead to system crashes or unauthorized access. This specific vulnerability, identified as CVE-2019-12379, affects the console mapping functionality within the kernel, potentially leading to memory leaks under certain conditions.
Vulnerability Detail
CVE-2019-12379 is a memory leak issue found in the con_insert_unipair function located in drivers/tty/vt/consolemap.c of the Linux kernel, affecting versions up to 5.1.5. The vulnerability arises when the kmalloc function encounters an ENOMEM (out of memory) error, leading to a failure to properly release allocated memory. This can result in increased memory usage over time, which may degrade system performance or lead to crashes. It is important to note that the significance of this vulnerability is disputed, with some arguing it may not pose a substantial risk.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can monitor system memory usage and manually free up resources when necessary. However, this does not resolve the underlying issue and is not a substitute for applying the patch.
Conclusion
CVE-2019-12379 presents a memory leak vulnerability in the Linux kernel that can lead to performance issues. It is crucial for users to update their systems to patched versions to mitigate potential risks. Temporary workarounds can help, but applying the fix is the best long-term solution.
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FAQ
CVE-2019-12379 is a memory leak vulnerability in the Linux kernel that can occur during memory allocation failures.
If exploited, this vulnerability can lead to increased memory consumption, potentially causing system slowdowns or crashes.
Any version of the Linux kernel up to 5.1.5 is affected by this vulnerability. Check your kernel version using 'uname -r'.
Monitor your system's memory usage and consider freeing up resources as a temporary measure until you can apply the patch.
You can use Vulert, which monitors open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without needing to sign up.
References
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