Vulnerability in Kernel package: aio: fix mremap after fork null-deref
Summary
GSD-2023-1002402: aio: fix mremap after fork null-deref. Affects Kernel versions >= e4a0d3e720e7e508749c1439b5ba3aff56c92976, < 4326d0080f7e84fba775da41d158f46cf9d3f1c2. No fix is published. How to fix ↓
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Background
The Kernel package is a fundamental component of the Linux operating system, responsible for managing system resources and providing an interface between hardware and software. It plays a crucial role in ensuring the stability and security of the system. However, a vulnerability has been discovered in the Kernel package, specifically in the aio (asynchronous I/O) subsystem. This vulnerability can lead to a null-dereference after a fork operation, potentially resulting in a system crash or privilege escalation.
Vulnerability Detail
The vulnerability in the aio subsystem of the Kernel package occurs due to a null-dereference issue after a fork operation. This vulnerability was introduced in version v3.19 of the Linux Kernel by commit e4a0d3e720e7e508749c1439b5ba3aff56c92976. It has been fixed in version v5.4.232 by commit 4326d0080f7e84fba775da41d158f46cf9d3f1c2. The null-dereference can be triggered when using the mremap system call after a fork operation. An attacker with local access to the system could exploit this vulnerability to crash the system or potentially escalate privileges.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability at this time.
Conclusion
In conclusion, a vulnerability has been identified in the Kernel package, specifically in the aio subsystem. This vulnerability can result in a null-dereference after a fork operation, potentially leading to a system crash or privilege escalation. It is recommended to update the Kernel package to version v5.4.232 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a system crash or potential privilege escalation.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and it will provide real-time alerts for open-source vulnerabilities.
No, this vulnerability affects the Kernel package in general and is not specific to any particular Linux distribution.
There are no known exploits for this vulnerability at this time.
This vulnerability was discovered by an automated vulnerability discovery tool.
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