Vulnerability in iommu/vt-d Package: Fix sysfs leak in alloc_iommu()
Summary
GSD-2021-1000570: iommu/vt-d: Fix sysfs leak in alloc_iommu(). Affects Kernel versions >= 39ab9555c24110671f8dc671311a26e5c985b592, < ca466561eef36d1ec657673e3944eb6340bddb5b. No fix is published. How to fix ↓
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Background
The iommu/vt-d package is a component of the Linux Kernel that provides support for Input-Output Memory Management Units (IOMMU) and Virtualization Technology for Directed I/O (VT-d). IOMMU is responsible for mapping device memory addresses to physical memory addresses, ensuring secure and efficient data transfers between devices and memory. VT-d enhances virtualization capabilities by allowing direct device access to virtual machines. This vulnerability affects the alloc_iommu() function within the iommu/vt-d package.
Vulnerability Detail
The vulnerability in alloc_iommu() function within the iommu/vt-d package allows for a sysfs leak. This leak can potentially expose sensitive system information to unauthorized users. An attacker could exploit this vulnerability to gather information about the system's IOMMU configuration, potentially aiding in further attacks. The vulnerability was introduced in version v4.11 of the Linux Kernel and has been fixed in version v5.12.9.
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. However, applying the recommended fix by updating the Linux Kernel to the latest version will address the issue.
Conclusion
The vulnerability in the iommu/vt-d package's alloc_iommu() function poses a risk of sysfs leak, potentially exposing sensitive system information. To mitigate this vulnerability, it is crucial to update the Linux Kernel to version v5.12.9 or later. Regularly updating the kernel is essential to ensure the application of the latest security patches. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The iommu/vt-d package is a component of the Linux Kernel that provides support for Input-Output Memory Management Units (IOMMU) and Virtualization Technology for Directed I/O (VT-d). It enables secure and efficient data transfers between devices and memory, as well as enhances virtualization capabilities.
This vulnerability allows for a sysfs leak in the alloc_iommu() function within the iommu/vt-d package. It can potentially expose sensitive system information to unauthorized users, which could aid in further attacks.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.12.9 or later. This can be done by obtaining the latest version from the official Linux Kernel repository and following the installation instructions provided.
There is no specific workaround mentioned for this vulnerability. However, applying the recommended fix by updating the Linux Kernel to the latest version will address the issue.
This vulnerability was introduced in version v4.11 of the Linux Kernel and has been fixed in version v5.12.9.
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