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Change History

In the Linux kernel, the following vulnerability has been resolved:

net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()

A malicious USB device claiming to be a CDC Phonet modem can overflow
the skb_shared_info->frags[] array by sending an unbounded sequence of
full-page bulk transfers.

Drop the skb and increment the length error when the frag limit is
reached.  This matches the same fix that commit f0813bcd2d9d ("net:
wwan: t7xx: fix potential skb->frags overflow in RX path") did for the
t7xx driver.

https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801

https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c

https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5

https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46