CVE-2022-20422: slab-out-of-bounds in emulation_proc_handler
Summary
CVE-2022-20422: In emulation_proc_handler of armv8_deprecated.c, there is a possible way to corrupt memory due to a race condition. Affects :linux_kernel: versions >= :0, < :2022-10-05. Fixed in :2022-10-05. How to fix ↓
Also tracked for
- linux · Debian:11
The same CVE-2022-20422 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
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Background
The package under scrutiny is the Linux Kernel, specifically the version used in the Android ecosystem. The Linux Kernel is a critical component of the operating system, responsible for managing system resources and providing an interface between hardware and software. It is widely used in various devices, including smartphones, tablets, and embedded systems. This vulnerability affects the ARMv8 architecture and is present in the deprecated armv8_deprecated.c file. The vulnerability allows for memory corruption due to a race condition, potentially leading to local privilege escalation. Exploitation does not require user interaction.
Vulnerability Detail
The vulnerability, identified as CVE-2022-20422, originates from a race condition in the emulation_proc_handler function of armv8_deprecated.c. This race condition can result in memory corruption, enabling an attacker to escalate their privileges locally. The impact of this vulnerability is significant, as it allows an attacker to gain elevated privileges without requiring additional execution privileges. The exploitation of this vulnerability does not rely on user interaction, making it particularly dangerous. It is crucial to address this vulnerability promptly to prevent potential privilege escalation attacks.
How To Fix
Minimum fixed version
:2022-10-05
This is the first release that contains the fix.
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Conclusion
The vulnerability CVE-2022-20422 in the Linux Kernel poses a significant risk of local privilege escalation. It is crucial to update the affected systems to a version of the Linux Kernel that includes the necessary patches. By doing so, the vulnerability can be mitigated, preventing potential exploitation and unauthorized privilege escalation. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability allows for local privilege escalation, enabling an attacker to gain elevated privileges without requiring additional execution privileges. This can lead to unauthorized access, data theft, or further compromise of the affected system.
No, exploitation of this vulnerability does not rely on user interaction. An attacker can exploit the vulnerability without any action from the user.
This vulnerability affects systems using the Linux Kernel in the Android ecosystem. Specifically, devices running the ARMv8 architecture are vulnerable.
No specific workaround has been provided for this vulnerability. It is recommended to apply the official fix by updating the affected system to a version of the Linux Kernel that includes the necessary patches.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities, including those in the Android ecosystem.
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