CVE-2026-74331 - Vulnerability Details

Vendors	Products
Linux	Linux Kernel

Link	Providers
https://git.kernel.org/stable/c/38149b57427c736c08d9aa4c7b87deacd53e9e63
https://git.kernel.org/stable/c/490b0385e4cfac691f7b18dde821c13e77b4770b
https://git.kernel.org/stable/c/7865a1bfd20d10c03b083a5fc392d907ca5099b3
https://git.kernel.org/stable/c/806cb8fabfde7f830da5ae87777d52fdf50c4774
https://git.kernel.org/stable/c/a5b2a68a391b05d54552f13548a72a46c65006f7
https://git.kernel.org/stable/c/c0f2dedd41fe14dbe076c1672214802fb42cd8c8
https://git.kernel.org/stable/c/d3ec78f8f8d48a04a9fac38d47275c34645e5103
https://git.kernel.org/stable/c/f25d6e4ec4c257030592bd671f113cf9584c52f0

Type	Values Removed	Values Added
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.
Title		firmware_loader: Fix recursive lock in device_cache_fw_images()
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/38149b57427c736c08d9aa4c7b87deacd53e9e63 https://git.kernel.org/stable/c/490b0385e4cfac691f7b18dde821c13e77b4770b https://git.kernel.org/stable/c/7865a1bfd20d10c03b083a5fc392d907ca5099b3 https://git.kernel.org/stable/c/806cb8fabfde7f830da5ae87777d52fdf50c4774 https://git.kernel.org/stable/c/a5b2a68a391b05d54552f13548a72a46c65006f7 https://git.kernel.org/stable/c/c0f2dedd41fe14dbe076c1672214802fb42cd8c8 https://git.kernel.org/stable/c/d3ec78f8f8d48a04a9fac38d47275c34645e5103 https://git.kernel.org/stable/c/f25d6e4ec4c257030592bd671f113cf9584c52f0

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74331", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.885Z", "datePublished": "2026-08-15T05:58:24.420Z", "dateUpdated": "2026-08-15T05:58:24.420Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T05:58:24.420Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/base/firmware_loader/main.c"], "versions": [{"version": "ac39b3ea73aacde876d1d5ee1ca3e2719f771482", "lessThan": "806cb8fabfde7f830da5ae87777d52fdf50c4774", "status": "affected", "versionType": "git"}, {"version": "ac39b3ea73aacde876d1d5ee1ca3e2719f771482", "lessThan": "7865a1bfd20d10c03b083a5fc392d907ca5099b3", "status": "affected", "versionType": "git"}, {"version": "ac39b3ea73aacde876d1d5ee1ca3e2719f771482", "lessThan": "490b0385e4cfac691f7b18dde821c13e77b4770b", "status": "affected", "versionType": "git"}, {"version": "ac39b3ea73aacde876d1d5ee1ca3e2719f771482", "lessThan": "38149b57427c736c08d9aa4c7b87deacd53e9e63", "status": "affected", "versionType": "git"}, {"version": "ac39b3ea73aacde876d1d5ee1ca3e2719f771482", "lessThan": "a5b2a68a391b05d54552f13548a72a46c65006f7", "status": "affected", "versionType": "git"}, {"version": "ac39b3ea73aacde876d1d5ee1ca3e2719f771482", "lessThan": "f25d6e4ec4c257030592bd671f113cf9584c52f0", "status": "affected", "versionType": "git"}, {"version": "ac39b3ea73aacde876d1d5ee1ca3e2719f771482", "lessThan": "c0f2dedd41fe14dbe076c1672214802fb42cd8c8", "status": "affected", "versionType": "git"}, {"version": "ac39b3ea73aacde876d1d5ee1ca3e2719f771482", "lessThan": "d3ec78f8f8d48a04a9fac38d47275c34645e5103", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/base/firmware_loader/main.c"], "versions": [{"version": "3.7", "status": "affected"}, {"version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.2-rc1"}]}]}], "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"}}}}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-74331", "lastModified": "2026-08-15T06:22:33.907", "metrics": {}, "published": "2026-08-15T06:22:33.907", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38149b57427c736c08d9aa4c7b87deacd53e9e63"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/490b0385e4cfac691f7b18dde821c13e77b4770b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7865a1bfd20d10c03b083a5fc392d907ca5099b3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/806cb8fabfde7f830da5ae87777d52fdf50c4774"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a5b2a68a391b05d54552f13548a72a46c65006f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c0f2dedd41fe14dbe076c1672214802fb42cd8c8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d3ec78f8f8d48a04a9fac38d47275c34645e5103"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f25d6e4ec4c257030592bd671f113cf9584c52f0"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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