CVE-2025-68169

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netpoll: Fix deadlock in memory allocation under spinlock<br /> <br /> Fix a AA deadlock in refill_skbs() where memory allocation while holding<br /> skb_pool-&gt;lock can trigger a recursive lock acquisition attempt.<br /> <br /> The deadlock scenario occurs when the system is under severe memory<br /> pressure:<br /> <br /> 1. refill_skbs() acquires skb_pool-&gt;lock (spinlock)<br /> 2. alloc_skb() is called while holding the lock<br /> 3. Memory allocator fails and calls slab_out_of_memory()<br /> 4. This triggers printk() for the OOM warning<br /> 5. The console output path calls netpoll_send_udp()<br /> 6. netpoll_send_udp() attempts to acquire the same skb_pool-&gt;lock<br /> 7. Deadlock: the lock is already held by the same CPU<br /> <br /> Call stack:<br /> refill_skbs()<br /> spin_lock_irqsave(&amp;skb_pool-&gt;lock) lock)