CVE-2026-31734 sched_ext: Fix is_bpf_migration_disabled() false negative on non-PREEMPT_RCU

In the Linux kernel, the following vulnerability has been resolved: schedext: Fix isbpfmigrationdisabled false negative on non-PREEMPTRCU Since commit 8e4f0b1ebcf2 "bpf: use rcureadlockdontmigrate for trampoline.c", the BPF prolog bpfprogenter calls migratedisable only when CONFIGPREEMPTRCU is...

PT-2026-36369

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the sched ext component where the is bpf migration disabled function produces a false negative on systems where CONFIG PREEMPT RCU is disabled. This occurs because the...