CVE-2026-98161 is a vulnerability in Linux Kernel
Published on September 25, 2026
nvdimm: pmem: keep PREFLUSH before data writes
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.
Products Associated with CVE-2026-98161
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Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 770a90c2127220f0fc194ce909ad4f0842e141cb is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 72561ca1ab96f0f0f32737a6171641e05a318538 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below c644a2f8fef5618fcf453c591177700fd07dd024 is affected.
- Before 6.18.52 is affected.
- Before 7.2.6 is affected.
- Version 6.18.52, <= 6.18.* is unaffected.
- Version 7.2.6, <= 7.2.* is unaffected.
- Version 7.3-rc1, <= * is unaffected.