Critical Memory Allocation Error in Linux Kernel - CVE-2025-39789
Summary
CVE-2025-39789: In the Linux kernel, the following vulnerability has been resolved: crypto: x86/aegis - Add missing error checks The skcipher_walk functions can allocate memory and can fail, so checking for errors is necessary. 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 system resources and facilitating communication between hardware and software. It provides essential services such as process management, memory management, and device control. The kernel is widely used across various distributions, including Debian, which is known for its stability and robustness. However, vulnerabilities in the kernel can lead to severe security risks, making it crucial to address them promptly.
Vulnerability Detail
CVE-2025-39789 is a vulnerability in the Linux kernel that arises from missing error checks in the crypto subsystem, specifically in the x86/aegis implementation. The skcipher_walk functions can allocate memory, and if this allocation fails, it can lead to undefined behavior or system crashes. This vulnerability can be exploited by attackers to cause denial of service or potentially execute arbitrary code, thereby compromising system integrity and security.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users may consider disabling the affected crypto features in the kernel configuration, although this is not a permanent solution. It is highly recommended to apply the patch as soon as it becomes available.
Conclusion
CVE-2025-39789 is a critical vulnerability in the Linux kernel that requires immediate attention. Users should update their systems to the latest patched version to mitigate potential risks. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2025-39789 is a vulnerability in the Linux kernel related to missing error checks in memory allocation within the crypto subsystem.
This vulnerability can lead to system crashes or denial of service, and in some cases, it may allow attackers to execute arbitrary code.
You can use Vulert, which monitors open-source vulnerabilities in your software. By utilizing the Vulert playground, you can check if your application is affected without any signup.
If an immediate update is not possible, consider disabling the affected crypto features as a temporary workaround until the patch can be applied.
More information can be found in the official CVE database and security advisories related to the Linux kernel.
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