CVE-2026-46031

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A deadlock occurs in the ks8851 driver when the ks8851 irq() function is executed. If a TX packet has been sent, the driver enables the TX queue via netif wake queue(), which schedules a TX softirq. When CONFIG PREEMPT RT=y is set and a packet is received, ks8851 rx pkts() calls netdev alloc skb ip align() to allocate SKBs. If bottom halves (BH) are enabled, local bh enable() triggers the pending softirq, which may call the .xmit callback ks8851 start xmit par(). This function attempts to lock the struct ks8851 net par .lock spinlock, which is already held by ks8851 irq(), resulting in a deadlock. If CONFIG PREEMPT RT is not set, the deadlock can still be triggered upon returning from spin unlock bh(&ks->statelock) in ks8851 irq() due to pending softirqs.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.