Vulnerability in Kernel: Leakage under Speculation on Mispredicted Branches
Summary
GSD-2021-1000986: bpf: Fix leakage under speculation on mispredicted branches. Affects Kernel versions >= b2157399cc9898260d6031c5bfe45fe137c1fbe7, < 5fc6ed1831ca5a30fb0ceefd5e33c7c689e7627b. 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 Kernel is a crucial component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionalities such as process management, memory management, and device drivers. The vulnerability identified in the Kernel relates to leakage under speculation on mispredicted branches, which can potentially lead to security breaches and unauthorized access to sensitive information.
Vulnerability Detail
The vulnerability arises from a flaw in the Kernel's handling of mispredicted branches. When a branch prediction is incorrect, the Kernel may inadvertently leak information due to speculative execution. Attackers could exploit this vulnerability to access privileged data or execute arbitrary code. The impact and attack plausibility of this vulnerability have not been proven, but it is crucial to address it to ensure the security of the system.
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 →
Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
The vulnerability in the Kernel, which involves leakage under speculation on mispredicted branches, poses a potential security risk. It is crucial to update the Linux Kernel to version v5.10.46 or later to mitigate this vulnerability. For further assistance or support in addressing this vulnerability, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The impact of this vulnerability is not yet proven, but it has the potential to allow unauthorized access to sensitive information or execution of arbitrary code.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) to the playground, and it will provide real-time alerts for open-source vulnerabilities.
No known exploit for this vulnerability has been reported at this time.
The recommended mitigation is to update the Linux Kernel to version v5.10.46 or later, which includes the fix for this vulnerability.
You can find more information about this vulnerability in the vulnerability database maintained by the Cloud Security Alliance. Here is the source link: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000986.json
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
