Cloud Vulnerability DB
A community-led vulnerabilities database
Vulnerability DatabaseCVE-2024-40937
CVE-2024-40937:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2024-40937 affects the Linux kernel's Google Virtual Ethernet (GVE) driver. The vulnerability was discovered and disclosed in July 2024, where the gverxfreeskb function incorrectly leaves napi->skb referencing an skb after it is freed with devkfreeskbany() (Kernel Git).
Technical details
The vulnerability exists in the GVE driver's RX path where gverxfreeskb incorrectly maintains a reference to a freed socket buffer. This can result in a subsequent call to napigetfrags returning a dangling pointer. The issue stems from a failure to clear napi->skb before freeing the socket buffer with devkfreeskbany() (Kernel Git).
Impact
The vulnerability can lead to a use-after-free condition in the Linux kernel's networking stack, potentially resulting in system crashes or memory corruption (Ubuntu).
Mitigation and workarounds
The issue has been fixed in various Linux kernel versions. Ubuntu has released patches for multiple versions including 24.04 LTS (6.8.0-44.44), 22.04 LTS (5.15.0-121.131), and others. The fix involves clearing napi->skb before the skb is freed (Ubuntu).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
Free Vulnerability Assessment
Benchmark your Cloud Security Posture
Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.
Additional Wiz resources
Get a personalized demo
Ready to see Wiz in action?
"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management