CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's IP Virtual Server (IPVS) component, specifically in the `ip_vs_nat_icmp()` function, where improper handling of the Internet Header Length (ihl) field can lead to out-of-bounds access. This could allow a local process to manipulate packet headers, potentially resulting in denial-of-service conditions or other unintended behavior. Organizations using Linux systems, particularly those relying on IPVS for load balancing, should prioritize applying the patch to mitigate these risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: ipvs: revalidate ihl to prevent out-of-bounds access While the outer IP header is already pulled into the skb head, we must be careful and revalidate the embedded headers after reading them from the skb frags to prevent out-of-bounds access. One such place reported by Sashiko is ip_vs_nat_icmp() where local process can change the ihl field and after skb_ensure_writable() we can see larger value which is a problem for the ip_send_check(cih) calls. Add check to drop the packet if the ihl field is changed.