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CVE-2026-97568

mptcp: syncookies: remember the request backup flag

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.11, and 3 more
None on Exploit-DB, Metasploit or GitHub

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 1008f2bcbc8e461c1df3aebba30ac4f616ebe570 · fixed in c97fa2c7ada82d4cac1c6c00643238dc4c462f15; From 6f01f41b6a492ddf2da7609967cfaf57e7ca48a7 · fixed in 1668b34452009d27be3262646de748a3e48ffd51; From 09176f80995105c62939728fbad5c437d61e7ff4 · fixed in b138e7dc719f0a3949de8bb6500b8cf1604eea06; From 8ed3e34c766e8264d5d2e0436f86c51604d6a8a7 · fixed in 360d99258a6402cb8e49771460944f19f04d25b7; From efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 · fixed in 61178d0b85b4b1b53e78b06e89d018d22d102f88; From efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 · fixed in 00b2bd518911e0daab00f4749cce68c191ccebb4; From efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 · fixed in 06d649f9cd03a9f8e768a658b20acf8d2c8022e0; From efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 · fixed in b76c0e28b392620dfbaf92cdeedbf115820b44cb; From 5.10.224 · fixed in 5.10.271; From 5.15.165 · fixed in 5.15.222; From 6.1.104 · fixed in 6.1.189; From 6.6.45 · fixed in 6.6.158; From 6.10.4 · fixed in 6.11

  • Linux Linux

    6.11

  • KernelLinux

    fixed in 5.10.271; From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.111; From 6.11.0 · fixed in 6.18.53; From 6.13.0 · fixed in 7.2.7

References 8

git.kernel.org