CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's networking subsystem, specifically in the mirroring functionality, which can lead to undetected packet loops when redirecting traffic between ingress and egress interfaces. This can result in network instability and degraded performance, as the system may not recognize the loop due to the loss of state information in the scheduling array. Network administrators and organizations utilizing Linux-based systems for critical networking tasks should prioritize addressing this issue to maintain network reliability and performance.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix ethx:ingress -> ethy:egress -> ethx:ingress mirred loop When mirred redirects to ingress (from either ingress or egress) the loop state from sched_mirred_dev array dev is lost because of 1) the packet deferral into the backlog and 2) the fact the sched_mirred_dev array is cleared. In such cases, if there was a loop we won't discover it. Here's a simple test to reproduce: ip a add dev port0 10.10.10.11/24 tc qdisc add dev port0 clsact tc filter add dev port0 egress protocol ip \ prio 10 matchall action mirred ingress redirect dev port1 tc qdisc add dev port1 clsact tc filter add dev port1 ingress protocol ip \ prio 10 matchall action mirred egress redirect dev port0 ping -c 1 -W0.01 10.10.10.10