CVE-2024-40931

mptcp: ensure snd_una is properly initialized on connect

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.06%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/208cd22ef5e57f82d38ec11c1a1703f9401d6dde patch
https://git.kernel.org/stable/c/7b9c7fc8600b64a86e4b47b2d190bba380267726 patch
https://git.kernel.org/stable/c/f03c46eabb3a67bd2993e237ab5517f00a5f1813 patch
https://git.kernel.org/stable/c/f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57f patch
https://git.kernel.org/stable/c/ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7ce patch
https://git.kernel.org/stable/c/8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3 patch

Frequently Asked Questions

What is the severity of CVE-2024-40931?
CVE-2024-40931 has been scored as a medium severity vulnerability.
How to fix CVE-2024-40931?
To fix CVE-2024-40931, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-40931 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-40931 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-40931?
CVE-2024-40931 affects Linux Linux, Linux Linux.
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