{"apiVersion":"1.0","identifier":"CVE-2026-74331","description":"In the Linux kernel, the following vulnerability has been resolved: firmware_loader: Fix recursive lock in device_cache_fw_images() A recursive locking deadlock can occur in the firmware loader-s power management notification handler. During system suspend or hibernation preparation, fw_pm_notify() calls device_cache_fw_images(). This function acquires fw_lock to set the firmware cache state to FW_LOADER_START_CACHE and then iterates over all devices using dpm_for_each_dev() while still holding the lock. For each device, dev_cache_fw_image() schedules asynchronous work to cache the firmware. If memory allocation for the async work entry fails (e.g., in out-of-memory conditions), async_schedule_node_domain() falls back to executing the work function synchronously in the current thread. The synchronous execution path (__async_dev_cache_fw_image() -> cache_firmware() -> request_firmware() -> assign_fw()) attempts to acquire fw_lock again. Since the current thread already holds fw_lock, this results in a recursive locking deadlock. Fix this by releasing fw_lock immediately after updating the cache state and before calling dpm_for_each_dev(). The lock is only needed to protect the state update. Concurrent firmware requests will correctly see the FW_LOADER_START_CACHE state and use the piggyback mechanism, which is independently protected by its own fwc->name_lock.","publishedAt":"2026-08-15T06:22:33","lastModifiedAt":"2026-08-17T06:19:27","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74331","cvssScore":null,"cvssVector":"Pending","epssProbability":0.0019,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74331","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74331","en":"https://www.redsauce.net/en/cves/CVE-2026-74331","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74331","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74331","de":"https://www.redsauce.net/de/cves/CVE-2026-74331","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74331","el":"https://www.redsauce.net/el/cves/CVE-2026-74331"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74331"}}