Use-after-free vulnerability in iommu/arm-smmu-v3-sva
Summary
GSD-2022-1003318: iommu/arm-smmu-v3-sva: Fix mm use-after-free. Affects Kernel versions >= 32784a9562fb0518b12e9797ee2aec52214adf6f, < fc90f13ea0dcd960e5002d204fa55cec4e0db2fa. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The iommu/arm-smmu-v3-sva is a component of the Linux Kernel that provides support for the System MMU (SMMU) on ARM-based systems. The SMMU is responsible for managing memory access and translation for devices connected to the system. It ensures that each device has access only to the memory regions it is authorized to use. The arm-smmu-v3-sva module specifically handles Shared Virtual Addressing (SVA) for the SMMU. SVA allows devices to access memory using virtual addresses instead of physical addresses, improving performance and security. However, a use-after-free vulnerability has been discovered in this module, which could potentially be exploited by an attacker to gain unauthorized access to sensitive information or execute arbitrary code.
Vulnerability Detail
The use-after-free vulnerability in iommu/arm-smmu-v3-sva occurs when a memory region is freed but still referenced by a pointer. This can lead to a situation where an attacker can manipulate the freed memory region, potentially causing a crash or executing arbitrary code. The vulnerability was introduced in Linux Kernel version v5.11 by commit 32784a9562fb0518b12e9797ee2aec52214adf6f and is fixed in version v5.15.46 by commit fc90f13ea0dcd960e5002d204fa55cec4e0db2fa. It is important to update to the fixed version to mitigate the risk of exploitation.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Conclusion
The use-after-free vulnerability in iommu/arm-smmu-v3-sva can be mitigated by updating the Linux Kernel to version v5.15.46 or later. It is important to apply this update to protect against potential exploitation. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
iommu/arm-smmu-v3-sva is a component of the Linux Kernel that provides support for the System MMU (SMMU) on ARM-based systems. It handles Shared Virtual Addressing (SVA) for the SMMU, allowing devices to access memory using virtual addresses.
A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed. This can lead to memory corruption and potentially allow an attacker to execute arbitrary code or gain unauthorized access to sensitive information.
An attacker can exploit this vulnerability by manipulating the freed memory region, potentially causing a crash or executing arbitrary code. This can be done by carefully crafting input or triggering specific conditions in the affected software.
No specific workaround has been provided for this vulnerability. It is recommended to update to the fixed version of the Linux Kernel to mitigate the risk of exploitation.
More information about the fix for this vulnerability can be found in the commit with the ID fc90f13ea0dcd960e5002d204fa55cec4e0db2fa in the official Linux Kernel repository.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
