net: ll_temac: Make sure to free skb when it is completely used
Summary
GSD-2021-1000933: net: ll_temac: Make sure to free skb when it is completely used. Affects Kernel versions < 6d120ab4dc39a543c6b63361e1d0541c382900a3. 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 ll_temac is a network driver in the Linux Kernel that provides support for the Xilinx TEMAC Ethernet controller. It is responsible for managing the transmission and reception of network packets. The vulnerability in this driver relates to the handling of skb (socket buffer) objects, which are used to store network data. If these skb objects are not properly freed after they are completely used, it can lead to resource leaks and potential memory corruption.
Vulnerability Detail
The vulnerability in the ll_temac driver arises from a failure to free skb objects when they are no longer needed. This can occur when the driver finishes processing a network packet but fails to release the associated skb object, resulting in a memory leak. If this vulnerability is successfully exploited, an attacker could potentially exhaust system resources, leading to a denial-of-service condition or even arbitrary code execution. The impact and attack plausibility of this vulnerability have not been proven yet.
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
There is no specific workaround mentioned for this vulnerability.
Conclusion
The ll_temac driver in the Linux Kernel is vulnerable to a memory leak issue related to the improper handling of skb objects. This vulnerability can potentially lead to resource exhaustion and other security risks. It is recommended to update the Linux Kernel to the latest version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
ll_temac is a network driver in the Linux Kernel that provides support for the Xilinx TEMAC Ethernet controller.
An skb (socket buffer) object is used in the Linux Kernel to store network data. It contains information such as the network packet payload, metadata, and pointers to other data structures.
If successfully exploited, this vulnerability could lead to resource leaks, memory corruption, denial-of-service, or arbitrary code execution.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
To fix this vulnerability, update the Linux Kernel to version v5.4.128 or later.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
