CVE-2022-50371 led: qcom-lpg: Fix sleeping in atomic
A bug in the Qualcomm LPG LED driver causes a kernel panic by calling a sleeping function in an atomic context, leading to system crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-50371?
CVE-2022-50371 is a medium-severity denial of service vulnerability in Linux kernel, published on 17 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
led: qcom-lpg: Fix sleeping in atomic
lpg_brighness_set() function can sleep, while led's brightness_set() callback must be non-blocking. Change LPG driver to use brightness_set_blocking() instead.
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 0, name: swapper/0 preempt_count: 101, expected: 0 INFO: lockdep is turned off. CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.1.0-rc1-00014-gbe99b089c6fc-dirty #85 Hardware name: Qualcomm Technologies, Inc. DB820c (DT) Call trace: dump_backtrace.part.0+0xe4/0xf0 show_stack+0x18/0x40 dump_stack_lvl+0x88/0xb4 dump_stack+0x18/0x34 __might_resched+0x170/0x254 __might_sleep+0x48/0x9c __mutex_lock+0x4c/0x400 mutex_lock_nested+0x2c/0x40 lpg_brightness_single_set+0x40/0x90 led_set_brightness_nosleep+0x34/0x60 led_heartbeat_function+0x80/0x170 call_timer_fn+0xb8/0x340 __run_timers.part.0+0x20c/0x254 run_timer_softirq+0x3c/0x7c _stext+0x14c/0x578 ____do_softirq+0x10/0x20 call_on_irq_stack+0x2c/0x5c do_softirq_own_stack+0x1c/0x30 __irq_exit_rcu+0x164/0x170 irq_exit_rcu+0x10/0x40 el1_interrupt+0x38/0x50 el1h_64_irq_handler+0x18/0x2c el1h_64_irq+0x64/0x68 cpuidle_enter_state+0xc8/0x380 cpuidle_enter+0x38/0x50 do_idle+0x244/0x2d0 cpu_startup_entry+0x24/0x30 rest_init+0x128/0x1a0 arch_post_acpi_subsys_init+0x0/0x18 start_kernel+0x6f4/0x734 __primary_switched+0xbc/0xc4
Weakness: CWE-667
Which versions are affected by CVE-2022-50371?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-50371?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-50371 being exploited?
There is no known exploitation of CVE-2022-50371 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-50371, GHSA-2x9f-2vfm-pqm9, UBUNTU-CVE-2022-50371.