CVE-2026-97524 Linux Kernel mptcp - Denial of Service

Linux kernel mptcp contains a logic flaw in subflow reset handling causing recursive calls in mptcp receive path, letting attackers trigger unneeded processing and potential resource issues, exploit requires specific error conditions.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.69% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
25 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for mptcp subflow reset handling.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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