Linux kernel: Renesas USBHS driver UAF in ISR during device removal
CVE-2026-43426 Published on May 8, 2026
usb: renesas_usbhs: fix use-after-free in ISR during device removal
In the Linux kernel, the following vulnerability has been resolved:
usb: renesas_usbhs: fix use-after-free in ISR during device removal
In usbhs_remove(), the driver frees resources (including the pipe array)
while the interrupt handler (usbhs_interrupt) is still registered. If an
interrupt fires after usbhs_pipe_remove() but before the driver is fully
unbound, the ISR may access freed memory, causing a use-after-free.
Fix this by calling devm_free_irq() before freeing resources. This ensures
the interrupt handler is both disabled and synchronized (waits for any
running ISR to complete) before usbhs_pipe_remove() is called.
Products Associated with CVE-2026-43426
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Affected Versions
Linux:- Version f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 and below c7012fc73dab4829404fedeeaa8531f12ac8545f is affected.
- Version f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 and below 51afaf919bbaacdd9cc9e146033ae0a743a42dd7 is affected.
- Version f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 and below 1899edac312ef17a7234851686e8a703f56d0a84 is affected.
- Version f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 and below 9c6159d5b72d5fc265cce5da04f27d730b552e69 is affected.
- Version f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 and below 6287e0c01ccb818e7214f88d885ffb7c9e81b0e0 is affected.
- Version f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 and below 0b7d11fd6e742ecc0b1eca44b4f0b93140c74bae is affected.
- Version f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 and below 6ffe44f022c95b1b29c691d2169c5abc046f7580 is affected.
- Version f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 and below 3cbc242b88c607f55da3d0d0d336b49bf1e20412 is affected.
- Version 3.0 is affected.
- Before 3.0 is unaffected.
- Version 5.10.253, <= 5.10.* is unaffected.
- Version 5.15.203, <= 5.15.* is unaffected.
- Version 6.1.167, <= 6.1.* is unaffected.
- Version 6.6.130, <= 6.6.* is unaffected.
- Version 6.12.78, <= 6.12.* is unaffected.
- Version 6.18.19, <= 6.18.* is unaffected.
- Version 6.19.9, <= 6.19.* is unaffected.
- Version 7.0, <= * is unaffected.