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usb urb lifecycle

About this tag
The USB URB lifecycle tag covers the management of USB Request Blocks (URBs) from creation to teardown, with a focus on anchoring, submission, and cleanup. A key example is CVE-2026-23324 in the Linux kernel's etas_es58x CAN driver, where an URB was not anchored before submission, allowing it to bypass usb_kill_anchored_urbs() during shutdown. This lifecycle bug can leave kernel resources dangling and compromise driver teardown paths. Discussions on WindowsForum.com highlight how such issues, while not always dramatic, are critical for driver stability and security. The tag is relevant for developers and IT professionals working with USB drivers, kernel debugging, and system reliability.
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    CVE-2026-23324 USB Kernel Bug: Anchor URBs Before Submit (etas_es58x)

    Microsoft’s Security Update Guide now lists CVE-2026-23324 as a Linux kernel issue in the can: usb: etas_es58x driver, and the kernel.org description makes the core problem sound deceptively small: an URB in the driver’s read bulk callback was not being anchored before submission, which could...
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    • can usb driver linux kernel security security update guidance usb urb lifecycle
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    • Forum: Security Alerts
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