{"api_version":"1","generated_at":"2026-08-15T10:57:08+00:00","cve":"CVE-2026-74331","urls":{"html":"https://cve.report/CVE-2026-74331","api":"https://cve.report/api/cve/CVE-2026-74331.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74331","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74331"},"summary":{"title":"firmware_loader: Fix recursive lock in device_cache_fw_images()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware_loader: Fix recursive lock in device_cache_fw_images()\n\nA recursive locking deadlock can occur in the firmware loader's power\nmanagement notification handler.\n\nDuring system suspend or hibernation preparation, fw_pm_notify() calls\ndevice_cache_fw_images(). This function acquires fw_lock to set the\nfirmware cache state to FW_LOADER_START_CACHE and then iterates over all\ndevices using dpm_for_each_dev() while still holding the lock.\n\nFor each device, dev_cache_fw_image() schedules asynchronous work to cache\nthe firmware. If memory allocation for the async work entry fails (e.g., in\nout-of-memory conditions), async_schedule_node_domain() falls back to\nexecuting the work function synchronously in the current thread.\n\nThe synchronous execution path (__async_dev_cache_fw_image() ->\ncache_firmware() -> request_firmware() -> assign_fw()) attempts to acquire\nfw_lock again. Since the current thread already holds fw_lock, this results\nin a recursive locking deadlock.\n\nFix this by releasing fw_lock immediately after updating the cache state\nand before calling dpm_for_each_dev(). The lock is only needed to protect\nthe state update. Concurrent firmware requests will correctly see the\nFW_LOADER_START_CACHE state and use the piggyback mechanism, which is\nindependently protected by its own fwc->name_lock.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:33","updated_at":"2026-08-15 06:22:33"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c0f2dedd41fe14dbe076c1672214802fb42cd8c8","name":"https://git.kernel.org/stable/c/c0f2dedd41fe14dbe076c1672214802fb42cd8c8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d3ec78f8f8d48a04a9fac38d47275c34645e5103","name":"https://git.kernel.org/stable/c/d3ec78f8f8d48a04a9fac38d47275c34645e5103","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a5b2a68a391b05d54552f13548a72a46c65006f7","name":"https://git.kernel.org/stable/c/a5b2a68a391b05d54552f13548a72a46c65006f7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f25d6e4ec4c257030592bd671f113cf9584c52f0","name":"https://git.kernel.org/stable/c/f25d6e4ec4c257030592bd671f113cf9584c52f0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7865a1bfd20d10c03b083a5fc392d907ca5099b3","name":"https://git.kernel.org/stable/c/7865a1bfd20d10c03b083a5fc392d907ca5099b3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/38149b57427c736c08d9aa4c7b87deacd53e9e63","name":"https://git.kernel.org/stable/c/38149b57427c736c08d9aa4c7b87deacd53e9e63","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/806cb8fabfde7f830da5ae87777d52fdf50c4774","name":"https://git.kernel.org/stable/c/806cb8fabfde7f830da5ae87777d52fdf50c4774","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/490b0385e4cfac691f7b18dde821c13e77b4770b","name":"https://git.kernel.org/stable/c/490b0385e4cfac691f7b18dde821c13e77b4770b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74331","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74331","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ac39b3ea73aacde876d1d5ee1ca3e2719f771482 806cb8fabfde7f830da5ae87777d52fdf50c4774 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ac39b3ea73aacde876d1d5ee1ca3e2719f771482 7865a1bfd20d10c03b083a5fc392d907ca5099b3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ac39b3ea73aacde876d1d5ee1ca3e2719f771482 490b0385e4cfac691f7b18dde821c13e77b4770b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ac39b3ea73aacde876d1d5ee1ca3e2719f771482 38149b57427c736c08d9aa4c7b87deacd53e9e63 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ac39b3ea73aacde876d1d5ee1ca3e2719f771482 a5b2a68a391b05d54552f13548a72a46c65006f7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ac39b3ea73aacde876d1d5ee1ca3e2719f771482 f25d6e4ec4c257030592bd671f113cf9584c52f0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ac39b3ea73aacde876d1d5ee1ca3e2719f771482 c0f2dedd41fe14dbe076c1672214802fb42cd8c8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ac39b3ea73aacde876d1d5ee1ca3e2719f771482 d3ec78f8f8d48a04a9fac38d47275c34645e5103 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.261 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/base/firmware_loader/main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"806cb8fabfde7f830da5ae87777d52fdf50c4774","status":"affected","version":"ac39b3ea73aacde876d1d5ee1ca3e2719f771482","versionType":"git"},{"lessThan":"7865a1bfd20d10c03b083a5fc392d907ca5099b3","status":"affected","version":"ac39b3ea73aacde876d1d5ee1ca3e2719f771482","versionType":"git"},{"lessThan":"490b0385e4cfac691f7b18dde821c13e77b4770b","status":"affected","version":"ac39b3ea73aacde876d1d5ee1ca3e2719f771482","versionType":"git"},{"lessThan":"38149b57427c736c08d9aa4c7b87deacd53e9e63","status":"affected","version":"ac39b3ea73aacde876d1d5ee1ca3e2719f771482","versionType":"git"},{"lessThan":"a5b2a68a391b05d54552f13548a72a46c65006f7","status":"affected","version":"ac39b3ea73aacde876d1d5ee1ca3e2719f771482","versionType":"git"},{"lessThan":"f25d6e4ec4c257030592bd671f113cf9584c52f0","status":"affected","version":"ac39b3ea73aacde876d1d5ee1ca3e2719f771482","versionType":"git"},{"lessThan":"c0f2dedd41fe14dbe076c1672214802fb42cd8c8","status":"affected","version":"ac39b3ea73aacde876d1d5ee1ca3e2719f771482","versionType":"git"},{"lessThan":"d3ec78f8f8d48a04a9fac38d47275c34645e5103","status":"affected","version":"ac39b3ea73aacde876d1d5ee1ca3e2719f771482","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/base/firmware_loader/main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.7"},{"lessThan":"3.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.261","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"3.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware_loader: Fix recursive lock in device_cache_fw_images()\n\nA recursive locking deadlock can occur in the firmware loader's power\nmanagement notification handler.\n\nDuring system suspend or hibernation preparation, fw_pm_notify() calls\ndevice_cache_fw_images(). This function acquires fw_lock to set the\nfirmware cache state to FW_LOADER_START_CACHE and then iterates over all\ndevices using dpm_for_each_dev() while still holding the lock.\n\nFor each device, dev_cache_fw_image() schedules asynchronous work to cache\nthe firmware. If memory allocation for the async work entry fails (e.g., in\nout-of-memory conditions), async_schedule_node_domain() falls back to\nexecuting the work function synchronously in the current thread.\n\nThe synchronous execution path (__async_dev_cache_fw_image() ->\ncache_firmware() -> request_firmware() -> assign_fw()) attempts to acquire\nfw_lock again. Since the current thread already holds fw_lock, this results\nin a recursive locking deadlock.\n\nFix this by releasing fw_lock immediately after updating the cache state\nand before calling dpm_for_each_dev(). The lock is only needed to protect\nthe state update. Concurrent firmware requests will correctly see the\nFW_LOADER_START_CACHE state and use the piggyback mechanism, which is\nindependently protected by its own fwc->name_lock."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:58:24.420Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/806cb8fabfde7f830da5ae87777d52fdf50c4774"},{"url":"https://git.kernel.org/stable/c/7865a1bfd20d10c03b083a5fc392d907ca5099b3"},{"url":"https://git.kernel.org/stable/c/490b0385e4cfac691f7b18dde821c13e77b4770b"},{"url":"https://git.kernel.org/stable/c/38149b57427c736c08d9aa4c7b87deacd53e9e63"},{"url":"https://git.kernel.org/stable/c/a5b2a68a391b05d54552f13548a72a46c65006f7"},{"url":"https://git.kernel.org/stable/c/f25d6e4ec4c257030592bd671f113cf9584c52f0"},{"url":"https://git.kernel.org/stable/c/c0f2dedd41fe14dbe076c1672214802fb42cd8c8"},{"url":"https://git.kernel.org/stable/c/d3ec78f8f8d48a04a9fac38d47275c34645e5103"}],"title":"firmware_loader: Fix recursive lock in device_cache_fw_images()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74331","datePublished":"2026-08-15T05:58:24.420Z","dateReserved":"2026-08-15T05:44:03.885Z","dateUpdated":"2026-08-15T05:58:24.420Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:33","lastModifiedDate":"2026-08-15 06:22:33","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74331","Ordinal":"1","Title":"firmware_loader: Fix recursive lock in device_cache_fw_images()","CVE":"CVE-2026-74331","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74331","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware_loader: Fix recursive lock in device_cache_fw_images()\n\nA recursive locking deadlock can occur in the firmware loader's power\nmanagement notification handler.\n\nDuring system suspend or hibernation preparation, fw_pm_notify() calls\ndevice_cache_fw_images(). This function acquires fw_lock to set the\nfirmware cache state to FW_LOADER_START_CACHE and then iterates over all\ndevices using dpm_for_each_dev() while still holding the lock.\n\nFor each device, dev_cache_fw_image() schedules asynchronous work to cache\nthe firmware. If memory allocation for the async work entry fails (e.g., in\nout-of-memory conditions), async_schedule_node_domain() falls back to\nexecuting the work function synchronously in the current thread.\n\nThe synchronous execution path (__async_dev_cache_fw_image() ->\ncache_firmware() -> request_firmware() -> assign_fw()) attempts to acquire\nfw_lock again. Since the current thread already holds fw_lock, this results\nin a recursive locking deadlock.\n\nFix this by releasing fw_lock immediately after updating the cache state\nand before calling dpm_for_each_dev(). The lock is only needed to protect\nthe state update. Concurrent firmware requests will correctly see the\nFW_LOADER_START_CACHE state and use the piggyback mechanism, which is\nindependently protected by its own fwc->name_lock.","Type":"Description","Title":"firmware_loader: Fix recursive lock in device_cache_fw_images()"}]}}}