CVE-2026-97568

Summary

In the Linux kernel, the following vulnerability has been resolved:

mptcp: syncookies: remember the request backup flag

Instead of using an uninitialised bit when copying the info in subflow_ulp_clone().

To fix this, no need to extend the join_entry structure: backup is coming from struct mptcp_subflow_request_sock, only one bit. Do the same here by using one bit for both.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1008f2bcbc8e461c1df3aebba30ac4f616ebe570 < c97fa2c7ada82d4cac1c6c00643238dc4c462f15affected
LinuxLinux6f01f41b6a492ddf2da7609967cfaf57e7ca48a7 < 1668b34452009d27be3262646de748a3e48ffd51affected
LinuxLinux09176f80995105c62939728fbad5c437d61e7ff4 < b138e7dc719f0a3949de8bb6500b8cf1604eea06affected
LinuxLinux8ed3e34c766e8264d5d2e0436f86c51604d6a8a7 < 360d99258a6402cb8e49771460944f19f04d25b7affected
LinuxLinuxefd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 61178d0b85b4b1b53e78b06e89d018d22d102f88affected
LinuxLinuxefd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 00b2bd518911e0daab00f4749cce68c191ccebb4affected
LinuxLinuxefd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 06d649f9cd03a9f8e768a658b20acf8d2c8022e0affected
LinuxLinuxefd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < b76c0e28b392620dfbaf92cdeedbf115820b44cbaffected
LinuxLinux73e2baa301ee3f62ff971e68877adeb37f98cc67affected
LinuxLinux5.10.224 < 5.10.271affected
LinuxLinux5.15.165 < 5.15.222affected
LinuxLinux6.1.104 < 6.1.189affected
LinuxLinux6.6.45 < 6.6.158affected
LinuxLinux6.10.4 < 6.11affected
LinuxLinux6.11affected
LinuxLinux0 < 6.11unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc3 <= *unaffected

Weaknesses

References