CVE-2024-50269 Information

Nov 20, 2024 cve

Description

In the Linux kernel the following vulnerability has been resolved:

usb: musb: sunxi: Fix accessing an released usb phy

Commit 6ed05c68cbca (�sb: musb: sunxi: Explicitly release USB PHY on exit) will cause that usb phy @glue->xceiv is accessed after released.

  1. register platform driver @sunxi_musb_driver // get the usb phy @glue->xceiv sunxi_musb_probe() -> devm_usb_get_phy().

  2. register and unregister platform driver @musb_driver musb_probe() -> sunxi_musb_init() use the phy here //the phy is released here musb_remove() -> sunxi_musb_exit() -> devm_usb_put_phy()

  3. register @musb_driver again musb_probe() -> sunxi_musb_init() use the phy here but the phy has been released at 2). …

Fixed by reverting the commit namely removing devm_usb_put_phy() from sunxi_musb_exit().

Reference

https://git.kernel.org/stable/c/721ddad945596220c123eb6f7126729fe277ee4f https://git.kernel.org/stable/c/4aa77d5ea9944468e16c3eed15e858fd5de44de1 https://git.kernel.org/stable/c/6e2848d1c8c0139161e69ac0a94133e90e9988e8 https://git.kernel.org/stable/c/63559ba8077cbadae1c92a65b73ea522bf377dd9 https://git.kernel.org/stable/c/ccd811c304d2ee56189bfbc49302cb3c44361893 https://git.kernel.org/stable/c/8a30da5aa9609663b3e05bcc91a916537f66a4cd https://git.kernel.org/stable/c/b08baa75b989cf779cbfa0969681f8ba2dc46569 https://git.kernel.org/stable/c/498dbd9aea205db9da674994b74c7bf8e18448bd

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