Cycle Time Restriction Bypass in Linux Kernel's TAPIRO Implementation
Summary
CVE-2024-36244: In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: extend minimum interval restriction to entire cycle too It is possible for syzbot to side-step the restriction imposed by the blamed... Affects linux versions 5.10.103-1 – 6.9.9-1. 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 Linux kernel is the core component of many operating systems, providing essential services for hardware and software interaction. It is known for its robustness and flexibility, supporting a wide range of devices and architectures. The TAPIRO (Time-Aware Priority Scheduler) feature in the Linux kernel is designed to manage time-sensitive network traffic, allowing for precise scheduling of packets. However, a vulnerability has been identified that could allow for the bypassing of cycle time restrictions, potentially leading to unexpected behavior in network traffic management.
Vulnerability Detail
In the Linux kernel, a vulnerability exists in the TAPIRO implementation where the cycle time can be set to a value that is shorter than the sum of entry intervals. This flaw allows syzbot, a kernel fuzzer, to exploit the situation by sidestepping the restrictions imposed by previous commits. The issue arises because the user-space API (UAPI) permits a cycle time that does not adhere to the necessary constraints, which could lead to improper scheduling of network packets, resulting in degraded performance or even denial of service in network communications.
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
Currently, there are no specific workarounds mentioned for this vulnerability. It is recommended to apply the fix as soon as it becomes available.
Conclusion
The CVE-2024-36244 vulnerability in the Linux kernel's TAPIRO implementation poses a significant risk by allowing cycle time restrictions to be bypassed. Users are advised to update their systems promptly to mitigate potential impacts on network performance. Utilizing tools like Vulert can help in monitoring for such vulnerabilities effectively.
See every vulnerability recorded for linux →
FAQ
CVE-2024-36244 is a vulnerability in the Linux kernel related to the TAPIRO implementation, allowing for cycle time restrictions to be bypassed.
This vulnerability can lead to improper scheduling of network packets, which may degrade performance or cause denial of service in network communications.
The vulnerability affects multiple versions of the Linux kernel, specifically those in Debian 11, 12, and 13.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without needing to sign up.
While there are no specific workarounds, it is crucial to monitor for updates and apply them as soon as they are available to mitigate the risk.
Related vulnerabilities
Recent vulnerabilities recorded for linux.
