CVE-2026-97568
mptcp: syncookies: remember the request backup flag
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 25, 2026 |
| Last Updated | Oct 19, 2026 |
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Affected Versions
Linux / Linux
1008f2bcbc8e461c1df3aebba30ac4f616ebe570 < c97fa2c7ada82d4cac1c6c00643238dc4c462f15 6f01f41b6a492ddf2da7609967cfaf57e7ca48a7 < 1668b34452009d27be3262646de748a3e48ffd51 09176f80995105c62939728fbad5c437d61e7ff4 < b138e7dc719f0a3949de8bb6500b8cf1604eea06 8ed3e34c766e8264d5d2e0436f86c51604d6a8a7 < 360d99258a6402cb8e49771460944f19f04d25b7 efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 61178d0b85b4b1b53e78b06e89d018d22d102f88 efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 00b2bd518911e0daab00f4749cce68c191ccebb4 efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < 06d649f9cd03a9f8e768a658b20acf8d2c8022e0 efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 < b76c0e28b392620dfbaf92cdeedbf115820b44cb 73e2baa301ee3f62ff971e68877adeb37f98cc67 5.10.224 < 5.10.271 5.15.165 < 5.15.222 6.1.104 < 6.1.189 6.6.45 < 6.6.158 6.10.4 < 6.11
Linux / Linux
6.11
References
git.kernel.org: https://git.kernel.org/stable/c/c97fa2c7ada82d4cac1c6c00643238dc4c462f15 git.kernel.org: https://git.kernel.org/stable/c/1668b34452009d27be3262646de748a3e48ffd51 git.kernel.org: https://git.kernel.org/stable/c/b138e7dc719f0a3949de8bb6500b8cf1604eea06 git.kernel.org: https://git.kernel.org/stable/c/360d99258a6402cb8e49771460944f19f04d25b7 git.kernel.org: https://git.kernel.org/stable/c/61178d0b85b4b1b53e78b06e89d018d22d102f88 git.kernel.org: https://git.kernel.org/stable/c/00b2bd518911e0daab00f4749cce68c191ccebb4 git.kernel.org: https://git.kernel.org/stable/c/06d649f9cd03a9f8e768a658b20acf8d2c8022e0 git.kernel.org: https://git.kernel.org/stable/c/b76c0e28b392620dfbaf92cdeedbf115820b44cb