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CVE-2024-50269
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CVE-2024-50269
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
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Description
In the Linux kernel, the following vulnerability has been resolved:
usb: musb: sunxi: Fix accessing an released usb phy
Commit 6ed05c68cbca (“usb: musb: sunxi: Explicitly release USB PHY on
exit”) will cause that usb phy @glue->xceiv is accessed after released.
register platform driver @sunxi_musb_driver
// get the usb phy @glue->xceiv
sunxi_musb_probe() –> devm_usb_get_phy().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()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().
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