CVE-2026-64376 (GCVE-0-2026-64376)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-08-17 04:54
VLAI
Title
firmware_loader: fix device reference leak in firmware_upload_register()
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 97730bbb242cde22b7140acd202ffd88823886c9 , < 517676ec7dfca064e08f94007a4abd21969de0a0 (git)
Affected: 97730bbb242cde22b7140acd202ffd88823886c9 , < 46d403da376a8b7c1187193294953816e1a8d7fe (git)
Affected: 97730bbb242cde22b7140acd202ffd88823886c9 , < 2619b47a0c8114eef980a56ade7e3ef4b58eb384 (git)
Affected: 97730bbb242cde22b7140acd202ffd88823886c9 , < 92f41769e5fd16bcd9ba97500d0517332e0a5b45 (git)
Affected: 97730bbb242cde22b7140acd202ffd88823886c9 , < 15432f19562fdb9199cce6d9fc24db12c71ed574 (git)
Affected: 97730bbb242cde22b7140acd202ffd88823886c9 , < 896df22ee57648b0c505bd76ddbc6b2341834696 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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}



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