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osvGoogleOSV:CVE-2024-40931
HistoryJul 12, 2024 - 1:15 p.m.

CVE-2024-40931

2024-07-1213:15:00
Google
osv.dev
4
linux kernel
vulnerability
mptcp
snd_una
initialization
issue
syzkaller
retransmit
fallback
software

AI Score

6.7

Confidence

Low

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.