CVE-2026-98161

In the Linux kernel, the following vulnerability has been resolved:

nvdimm: pmem: keep PREFLUSH before data writes

pmem_submit_bio() records a REQ_PREFLUSH error, but continues to copy the

bio data and can later overwrite the error with a successful REQ_FUA flush.

That lets data writes run after a failed preflush and can complete the bio

successfully despite the failed ordering barrier.

Run the REQ_PREFLUSH flush synchronously before touching the bio data and

complete the bio with the flush error if it fails. Keep asynchronous flush

chaining for REQ_FUA. At that point, data copy has completed and the parent

bio can wait for the chained flush bio.