Answer in brief
CVE-2026-64376 records a Medium severity (CVSS 5.5) 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.
CVSS is 5.5. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| 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
Sep 8, 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.