Uninitialized Memory Access in Linux Kernel BPF - CVE-2024-42063
Summary
CVE-2024-42063: In the Linux kernel, the following vulnerability has been resolved: bpf: Mark bpf prog stack with kmsan_unposion_memory in interpreter mode syzbot reported uninit memory usages during map_{lookup,delete}_elem. 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
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
Background
The Linux kernel is the core component of the Linux operating system, responsible for managing hardware resources and providing essential services to applications. It supports a wide range of functionalities, including process management, memory management, and device control. The kernel's BPF (Berkeley Packet Filter) subsystem allows for efficient packet filtering and monitoring, but it is susceptible to vulnerabilities that can lead to security risks, such as uninitialized memory access, which can expose sensitive data or cause system instability.
Vulnerability Detail
CVE-2024-42063 is a vulnerability in the Linux kernel's BPF subsystem, specifically related to uninitialized memory access during the execution of BPF programs in interpreter mode. The issue arises when the BPF program attempts to access a pointer that has not been properly initialized, leading to potential information leaks or undefined behavior. The vulnerability was reported by syzbot, highlighting uninitialized memory usage during the execution of map lookup and delete operations. This can result in the exposure of sensitive data or system crashes, making it critical to address.
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. The best course of action is to apply the available patches as soon as they are released.
Conclusion
CVE-2024-42063 is a significant vulnerability in the Linux kernel's BPF subsystem that can lead to uninitialized memory access. Users are advised to update their systems promptly to mitigate potential risks associated with this vulnerability. Regular monitoring and timely updates are essential for maintaining system security.
See every vulnerability recorded for linux →
FAQ
CVE-2024-42063 is a vulnerability in the Linux kernel's BPF subsystem that allows for uninitialized memory access, potentially leading to information leaks or system instability.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
The vulnerability can lead to exposure of sensitive data, system crashes, or undefined behavior in applications that utilize the BPF subsystem.
Yes, patches are available for various Debian versions. Users should update their Linux kernel to the latest version that includes the fix for CVE-2024-42063.
The CVSS score for CVE-2024-42063 is 5.5, indicating a moderate level of severity.
Related vulnerabilities
Recent vulnerabilities recorded for linux.
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
