Slab-out-of-bounds Vulnerability in Linux Kernel
Summary
UVI-2021-1001168: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions. Affects Kernel versions >= f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74, < 115784bcccf135c3a3548098153413d76f16aae0. 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 a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for managing system resources, including memory, processes, and device drivers. The kernel is responsible for facilitating communication between hardware and software components, ensuring the smooth operation of the system. However, a vulnerability has been discovered in the kernel that could potentially lead to a slab-out-of-bounds issue.
Vulnerability Detail
The slab-out-of-bounds vulnerability in the Linux Kernel affects the IPv6 module specifically in the 'fib6_nh_flush_exceptions' function. This vulnerability was introduced in version v5.3 and was fixed in version v5.13.6. The issue arises due to a flaw in the code that can result in accessing memory outside the allocated slab, leading to potential memory corruption or information disclosure. An attacker could potentially exploit this vulnerability to execute arbitrary code, escalate privileges, or crash 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
As a workaround, users can consider disabling the IPv6 module if it is not required for their specific use case. Disabling IPv6 can help mitigate the risk associated with this vulnerability. However, it is important to note that this workaround may impact network connectivity and functionality that relies on IPv6. Therefore, it is recommended to apply the official patch or update the kernel instead of relying solely on this workaround.
Conclusion
The slab-out-of-bounds vulnerability in the Linux Kernel poses a significant risk to the security and stability of affected systems. It is crucial to promptly update the kernel to version v5.13.6 or later to mitigate this vulnerability. Alternatively, users can consider disabling the IPv6 module as a temporary workaround. For further assistance and support in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
A slab-out-of-bounds vulnerability refers to a situation where a program attempts to access memory outside the allocated slab. This can lead to memory corruption, information disclosure, or other security issues.
An attacker can exploit this vulnerability by crafting malicious input that triggers the slab-out-of-bounds issue. By exploiting this vulnerability, an attacker may be able to execute arbitrary code, escalate privileges, or crash the system.
The vulnerability was introduced in version v5.3 of the Linux Kernel. All versions between v5.3 and v5.13.5 are affected. The issue has been fixed in version v5.13.6.
The impact of this vulnerability can vary depending on the attacker's capabilities and the specific system configuration. Possible consequences include arbitrary code execution, privilege escalation, or system crashes, which can lead to service disruption and potential data breaches.
Disabling the IPv6 module can serve as a temporary mitigation measure. However, it is strongly recommended to update the kernel to the patched version to fully address the vulnerability.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
