Refcount Leak in icp_opal_init() in powerpc/xics
Summary
GSD-2022-1004063: powerpc/xics: fix refcount leak in icp_opal_init(). Affects Kernel versions < 977dbc81d0f866ef63b93c127b7404f07734b3cc. No fix is published. How to fix ↓
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Background
The powerpc/xics package is a component of the Linux Kernel, which is responsible for handling interrupt controllers on PowerPC systems. The icp_opal_init() function in this package initializes the interrupt controller for Open Firmware-based systems. This vulnerability in icp_opal_init() leads to a refcount leak, which can result in resource exhaustion and potential denial-of-service attacks.
Vulnerability Detail
The vulnerability in icp_opal_init() is caused by a refcount leak, where a reference to a resource is not properly released. This can lead to resource exhaustion, as the leaked references are not freed, potentially resulting in denial-of-service attacks. An attacker could exploit this vulnerability by repeatedly triggering the affected code path, causing the refcount to leak and exhaust system resources. The impact of this vulnerability can vary depending on the specific system configuration and workload.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround provided for this vulnerability. The recommended approach is to update the Linux Kernel to the patched version.
Conclusion
In conclusion, the vulnerability in icp_opal_init() in the powerpc/xics package can lead to a refcount leak, potentially resulting in resource exhaustion and denial-of-service attacks. It is crucial to update the Linux Kernel to the patched version to address this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the specific system configuration and workload. It can potentially lead to resource exhaustion and denial-of-service attacks.
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 to the playground, and it will analyze and alert you in real-time if the vulnerability is present.
At the time of this report, there is no known public exploit for this vulnerability. However, it is still important to apply the patch to mitigate the risk.
This vulnerability affects PowerPC systems running the Linux Kernel. The specific impact may depend on the system configuration and workload.
The recommended remediation is to update the Linux Kernel to version v4.9.318 or later, which includes the fix for this vulnerability.
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