Answer in brief
CVE-2026-64376 records a Unknown severity vulnerability in firmware_loader: fix device reference leak in firmware_upload_register(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=97730bbb242cde22b7140acd202ffd88823886c9 <517676ec7dfca064e08f94007a4abd21969de0a0 || >=97730bbb242cde22b7140acd202ffd88823886c9 <46d403da376a8b7c1187193294953816e1a8d7fe || >=97730bbb242cde22b7140acd202ffd88823886c9 <2619b47a0c8114eef980a56ade7e3ef4b58eb384 || >=97730bbb242cde22b7140acd202ffd88823886c9 <92f41769e5fd16bcd9ba97500d0517332e0a5b45 || >=97730bbb242cde22b7140acd202ffd88823886c9 <15432f19562fdb9199cce6d9fc24db12c71ed574 || >=97730bbb242cde22b7140acd202ffd88823886c9 <896df22ee57648b0c505bd76ddbc6b2341834696 | 517676ec7dfca064e08f94007a4abd21969de0a0, 46d403da376a8b7c1187193294953816e1a8d7fe, 2619b47a0c8114eef980a56ade7e3ef4b58eb384, 92f41769e5fd16bcd9ba97500d0517332e0a5b45, 15432f19562fdb9199cce6d9fc24db12c71ed574, 896df22ee57648b0c505bd76ddbc6b2341834696 |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
In the Linux kernel, the following vulnerability has been resolved: firmware_loader: fix device reference leak in firmware_upload_register() firmware_upload_register() -> fw_create_instance() -> device_initialize() After fw_create_instance() succeeds, the lifetime of the embedded struct device is expected to be managed through the device core reference counting, since fw_create_instance() has already called device_initialize(). In firmware_upload_register(), if alloc_lookup_fw_priv() fails after fw_create_instance() succeeds, the code reaches free_fw_sysfs and frees fw_sysfs directly instead of releasing the device reference with put_device(). This may leave the reference count of the embedded struct device unbalanced, resulting in a refcount leak. The issue was identified by a static analysis tool I developed and confirmed by manual review. Fix this by using put_device(fw_dev) in the failure path and letting fw_dev_release() handle the final cleanup, instead of freeing the instance directly from the error path.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64376 records a Unknown severity vulnerability in firmware_loader: fix device reference leak in firmware_upload_register(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=97730bbb242cde22b7140acd202ffd88823886c9 <517676ec7dfca064e08f94007a4abd21969de0a0 || >=97730bbb242cde22b7140acd202ffd88823886c9 <46d403da376a8b7c1187193294953816e1a8d7fe || >=97730bbb242cde22b7140acd202ffd88823886c9 <2619b47a0c8114eef980a56ade7e3ef4b58eb384 || >=97730bbb242cde22b7140acd202ffd88823886c9 <92f41769e5fd16bcd9ba97500d0517332e0a5b45 || >=97730bbb242cde22b7140acd202ffd88823886c9 <15432f19562fdb9199cce6d9fc24db12c71ed574 || >=97730bbb242cde22b7140acd202ffd88823886c9 <896df22ee57648b0c505bd76ddbc6b2341834696 | 517676ec7dfca064e08f94007a4abd21969de0a0, 46d403da376a8b7c1187193294953816e1a8d7fe, 2619b47a0c8114eef980a56ade7e3ef4b58eb384, 92f41769e5fd16bcd9ba97500d0517332e0a5b45, 15432f19562fdb9199cce6d9fc24db12c71ed574, 896df22ee57648b0c505bd76ddbc6b2341834696 |
| Linux/Linuxgeneric | 5.19 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
In the Linux kernel, the following vulnerability has been resolved: firmware_loader: fix device reference leak in firmware_upload_register() firmware_upload_register() -> fw_create_instance() -> device_initialize() After fw_create_instance() succeeds, the lifetime of the embedded struct device is expected to be managed through the device core reference counting, since fw_create_instance() has already called device_initialize(). In firmware_upload_register(), if alloc_lookup_fw_priv() fails after fw_create_instance() succeeds, the code reaches free_fw_sysfs and frees fw_sysfs directly instead of releasing the device reference with put_device(). This may leave the reference count of the embedded struct device unbalanced, resulting in a refcount leak. The issue was identified by a static analysis tool I developed and confirmed by manual review. Fix this by using put_device(fw_dev) in the failure path and letting fw_dev_release() handle the final cleanup, instead of freeing the instance directly from the error path.
Quoted source text, attributed separately from HOL analysis.