CVE-2020-36789

In the Linux kernel, the following vulnerability has been resolved: can: dev: cangetechoskb: prevent call to kfreeskb in hard IRQ context If a driver calls cangetechoskb during a hardware IRQ which is often, but not always, the case, the 'WARNONinirq' in net/core/skbuff.cskbreleaseheadstate might...

CVE-2020-36789

The CVE-2020-36789 entry pertains to the Linux kernel CAN stack. A driver calling can_get_echo_skb() in hardware IRQ context could trigger WARN_ON(in_irq) in skb_release_head_state() under congestion, risking NULL pointer dereference. Root cause: kfree_skb() used instead of the IRQ-safe path in n...