CVE-2026-74262
CVE CVE-2026-74262EUVD EUVD-2026-59409Published 2026-08-15T05:57:38.000ZLast changed 2026-08-17T05:45:10.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: kcm: use WRITE_ONCE() when changing lower socket callbacks kcm_attach() replaces a live lower TCP socket's sk_data_ready and sk_write_space callbacks with KCM handlers, and kcm_unattach() restores them later. Those callback-pointer updates are still plain stores even though the same fields can be read and invoked concurrently on other CPUs. If another CPU observes an older callback snapshot after the live field has already been restored, callback execution can run with a mismatched target and sk_user_data state, leading to stale or misdirected wakeups. Use WRITE_ONCE() for the callback replacement and restore operations so these shared callback fields follow the same visibility contract already established by the earlier 4022 fixes.
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 patch: 6.1.178; ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 <fa26e4606aed0f7fe793c325506adeda1d847a43; ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 <9684fff87124b201e11dea01ded9173025359a0f; patch: 0; ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 <47186409c092cd7dd70350999186c700233e854d; ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 <b4ccd6eef671d7c44a30123cd29f3acf3de8468e; 4.6; patch: 6.18.40; ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 <0cb3e2f40679032c1aa2186280a86e5ead0161ee; patch: 5.15.212; patch: 5.10.261; patch: 6.12.97; patch: 7.2; patch: 6.6.145; ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 <f01fb6138f8eb606b56ce9158e2d8b72352c53f4; patch: 7.1.5; ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 <11faefd11ce2448bac7279ab302dd1954a6547fe; ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 <b8c90823cdfb5f3d22f261aeb3e9066612853c36
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 daysPatchlage 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.