CVE-2026-64376

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.

• https://git.kernel.org/stable/c/15432f19562fdb9199cce6d9fc24db12c71ed574Patch
• https://git.kernel.org/stable/c/2619b47a0c8114eef980a56ade7e3ef4b58eb384Patch
• https://git.kernel.org/stable/c/46d403da376a8b7c1187193294953816e1a8d7fePatch
• https://git.kernel.org/stable/c/517676ec7dfca064e08f94007a4abd21969de0a0Patch
• https://git.kernel.org/stable/c/896df22ee57648b0c505bd76ddbc6b2341834696Patch
• https://git.kernel.org/stable/c/92f41769e5fd16bcd9ba97500d0517332e0a5b45Patch

Published

Jul 25, 2026

Last Modified

Sep 8, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-64370In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-64371In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-64372In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-64373In the Linux kernel, the following vulnerability has been re…4.7
• CVE-2026-64374In the Linux kernel, the following vulnerability has been re…7.5
• CVE-2026-64375In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-64377In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-64378In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-64379In the Linux kernel, the following vulnerability has been re…7.1
• CVE-2026-64380In the Linux kernel, the following vulnerability has been re…8.2
• CVE-2026-64381In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-64382In the Linux kernel, the following vulnerability has been re…8.8