CVE-2026-97568mptcp: syncookies: remember the request backup flag
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1008f2bcbc8e461c1df3aebba30ac4f616ebe570 before c97fa2c7ada82d4cac1c6c00643238dc4c462f15; from 6f01f41b6a492ddf2da7609967cfaf57e7ca48a7 before 1668b34452009d27be3262646de748a3e48ffd51; from 09176f80995105c62939728fbad5c437d61e7ff4 before b138e7dc719f0a3949de8bb6500b8cf1604eea06; from 8ed3e34c766e8264d5d2e0436f86c51604d6a8a7 before 360d99258a6402cb8e49771460944f19f04d25b7; from efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 before 61178d0b85b4b1b53e78b06e89d018d22d102f88; from efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 before 00b2bd518911e0daab00f4749cce68c191ccebb4; from efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 before 06d649f9cd03a9f8e768a658b20acf8d2c8022e0; from efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 before b76c0e28b392620dfbaf92cdeedbf115820b44cb; and 6 more ranges | CNA record |
References
- https://git.kernel.org/stable/c/c97fa2c7ada82d4cac1c6c00643238dc4c462f15
- https://git.kernel.org/stable/c/1668b34452009d27be3262646de748a3e48ffd51
- https://git.kernel.org/stable/c/b138e7dc719f0a3949de8bb6500b8cf1604eea06
- https://git.kernel.org/stable/c/360d99258a6402cb8e49771460944f19f04d25b7
- https://git.kernel.org/stable/c/61178d0b85b4b1b53e78b06e89d018d22d102f88
- https://git.kernel.org/stable/c/00b2bd518911e0daab00f4749cce68c191ccebb4
- https://git.kernel.org/stable/c/06d649f9cd03a9f8e768a658b20acf8d2c8022e0
- https://git.kernel.org/stable/c/b76c0e28b392620dfbaf92cdeedbf115820b44cb
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.