Null Pointer Dereference in alcor_pci in Linux Kernel
Summary
GSD-2021-1001280: misc: alcor_pci: fix null-ptr-deref when there is no PCI bridge. Affects Kernel versions < 58f69684ba03e5b0e0a3ae844a845280c0f06309. No fix is published. How to fix ↓
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Background
The alcor_pci is a component in the Linux Kernel that handles PCI bridges. It is responsible for managing communication between devices connected to the PCI bus. The vulnerability in alcor_pci arises when there is no PCI bridge present, leading to a null pointer dereference. This can result in a system crash or potential privilege escalation if exploited by an attacker.
Vulnerability Detail
The null pointer dereference vulnerability in alcor_pci occurs when the code attempts to access a memory location using a null pointer. In this case, when there is no PCI bridge, the code fails to handle this scenario correctly, leading to a crash or potential security breach. An attacker could potentially exploit this vulnerability to execute arbitrary code with elevated privileges or cause a denial of service. The vulnerability has been fixed in Linux Kernel version v5.10.52 by commit 58f69684ba03e5b0e0a3ae844a845280c0f06309.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. The recommended approach is to apply the fix by updating the Linux Kernel.
Conclusion
The null pointer dereference vulnerability in alcor_pci in the Linux Kernel can lead to system crashes or potential privilege escalation. It is crucial to update the Linux Kernel to version v5.10.52 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
alcor_pci is a component in the Linux Kernel that handles PCI bridges, facilitating communication between devices connected to the PCI bus.
A null pointer dereference vulnerability occurs when a program attempts to access a memory location using a null pointer, leading to a crash or potential security breach.
The consequences of this vulnerability include system crashes and potential privilege escalation if exploited by an attacker.
Yes, the vulnerability has been fixed in Linux Kernel version v5.10.52 by commit 58f69684ba03e5b0e0a3ae844a845280c0f06309.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.52 or later.
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