CVE-2026-97568

CVE CVE-2026-97568EUVD EUVD-2026-86876Published 2026-09-25T10:21:54.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 6.6.45 <6.7; 73e2baa301ee3f62ff971e68877adeb37f98cc67; 6.1.104 <6.2; patch: 7.3-rc3; 1008f2bcbc8e461c1df3aebba30ac4f616ebe570; 8ed3e34c766e8264d5d2e0436f86c51604d6a8a7; efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 <00b2bd518911e0daab00f4749cce68c191ccebb4; patch: 0; 6.11; 5.15.165 <5.16; 6.10.4 <6.11; efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 <61178d0b85b4b1b53e78b06e89d018d22d102f88; patch: 6.18.53; efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 <b76c0e28b392620dfbaf92cdeedbf115820b44cb; 6f01f41b6a492ddf2da7609967cfaf57e7ca48a7; 09176f80995105c62939728fbad5c437d61e7ff4; patch: 7.2.7; 5.10.224 <5.11; efd340bf3d7779a3a8ec954d8ec0fb8a10f24982 <06d649f9cd03a9f8e768a658b20acf8d2c8022e0; patch: 6.12.111

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.