CVE intelligence and bounded remediation

CVE-2022-50371 — Linux Linux Kernel security vulnerability

Medium CVSS 5.5

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/…

Severity
Medium
CVSS
5.5 (3.1)
Published
2025-09-17
CISA KEV
Not currently listed
Ecosystem
linux/kernel
Weaknesses
CWE-667

Affected products

  • linux / linux_kernel

Showing 1 representative product identities from 2 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Race condition, TOCTOU, and lifecycle synchronization

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Check exposure

  • Map concurrent actors, shared state, lock boundaries, signals, callbacks, retries, and check-then-use sequences in the affected path.
  • Determine whether untrusted users can influence timing, object names, filesystem state, or repeated state transitions.
  • Identify clustered and multi-process behavior that repository-local tests may not represent.

Remediate safely

  • Make the sensitive state transition atomic or protect it with a consistently ordered synchronization primitive.
  • Perform authorization and invariant checks on the same authoritative object and transaction used for the operation.
  • Use unique private resources, safe ownership transfer, and idempotent operations; add deterministic concurrency regression tests.

Authoritative sources

Complete CVE record and remediation plan

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