Vulnerability in Linux

CVE-2026-97523

In the Linux kernel, the following vulnerability has been resolved: mptcp: close race between scheduler and state change The mptcp scheduler may race with subflow sockets state change: data transmission on the selected socket may fail and a later release could try to use mss_now reset to 0 for a divide operation. Address the issue by explicitly checking for the critical scenario.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (54.5th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.5% 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-2026-97523: held from 0.007 to 0.007.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.001

Affected products

  • Linux — versions 6.0, 8caf5c15b5288d52d9c89374d6c10fa32ee84ec5, fb9c73ef2ac2ec816efdc8b9267bc04e1369c20b

References

Frequently asked questions

What is CVE-2026-97523?
CVE-2026-97523 is a high-severity vulnerability in Linux. CVSS score: 7.5/10. Published 2026-09-25.
How severe is CVE-2026-97523?
High severity. CVSS v3 base score is 7.5 out of 10.