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
LinuxLinuxefd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 61178d0b85b4b1b53e78b06e89d018d22d102f88affected
LinuxLinuxefd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 00b2bd518911e0daab00f4749cce68c191ccebb4affected
LinuxLinuxefd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 06d649f9cd03a9f8e768a658b20acf8d2c8022e0affected
LinuxLinuxefd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < b76c0e28b392620dfbaf92cdeedbf115820b44cbaffected
LinuxLinux1008f2bcbc8e461c1df3aebba30ac4f616ebe570affected
LinuxLinux6f01f41b6a492ddf2da7609967cfaf57e7ca48a7affected
LinuxLinux09176f80995105c62939728fbad5c437d61e7ff4affected
LinuxLinux8ed3e34c766e8264d5d2e0436f86c51604d6a8a7affected
LinuxLinux73e2baa301ee3f62ff971e68877adeb37f98cc67affected
LinuxLinux5.10.224 < 5.11affected
LinuxLinux5.15.165 < 5.16affected
LinuxLinux6.1.104 < 6.2affected
LinuxLinux6.6.45 < 6.7affected
LinuxLinux6.10.4 < 6.11affected
LinuxLinux6.11affected
LinuxLinux0 < 6.11unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2.7 <= 7.2.*unaffected
LinuxLinux7.3-rc3 <= *unaffected

Weaknesses

References