Threats Tagged 'cve-2026-63982'

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

A vulnerability in the Linux kernel's network scheduler (net/sched) involving mirred redirect loops between ingress and egress interfaces has been resolved. The issue occurs because the loop detection state is lost due to packet deferral and clearing of the sched_mirred_dev array, preventing discovery of mirred loops. This can cause unexpected network behavior when mirred actions redirect packets between interfaces in a loop. A test case demonstrates the loop creation using traffic control commands and ping. No CVSS score is available for this vulnerability.