Your kernel is too new. The exploit page is a bit sensationalist as there is indeed a fix that’s been committed to the mainline kernels as of 1 April.

From https://www.cve.org/CVERecord?id=CVE-2026-31431

Defult Status: affected

affected

affected at 4.14

unaffected from 0 before 4.14

unaffected from 5.10.254 through 5.10.*

unaffected from 5.15.204 through 5.15.*

unaffected from 6.1.170 through 6.1.*

unaffected from 6.6.137 through 6.6.*

unaffected from 6.12.85 through 6.12.*

unaffected from 6.18.22 through 6.18.*

unaffected from 6.19.12 through 6.19.*

unaffected from 7.0