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CVE-2024-40931

Disclosure Date: July 12, 2024
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Description

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

mptcp: ensure snd_una is properly initialized on connect

This is strictly related to commit fb7a0d334894 (“mptcp: ensure snd_nxt
is properly initialized on connect”). It turns out that syzkaller can
trigger the retransmit after fallback and before processing any other
incoming packet – so that snd_una is still left uninitialized.

Address the issue explicitly initializing snd_una together with snd_nxt
and write_seq.

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General Information

Vendors

  • Linux

Products

  • Linux
Technical Analysis