Vulnerability in Linux

CVE-2024-40931

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (15.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2024-40931: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Linux — versions 8fd738049ac3d67a937d36577763b47180aae1ad, 5.9, 0
  • Linux Kernel — versions 6.10

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2024-40931?
CVE-2024-40931 is a medium-severity vulnerability in Linux, classified under Use of Uninitialized Resource. CVSS score: 5.5/10. Published 2024-07-12.
How severe is CVE-2024-40931?
Medium severity. CVSS v3 base score is 5.5 out of 10.