CVE-2026-98161

Summary

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.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/72561ca1ab96f0f0f32737a6171641e05a318538 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/72561ca1ab96f0f0f32737a6171641e05a318538Patch
• https://git.kernel.org/stable/c/770a90c2127220f0fc194ce909ad4f0842e141cbPatch
• https://git.kernel.org/stable/c/c644a2f8fef5618fcf453c591177700fd07dd024Patch
• https://git.kernel.org/stable/c/22d1f4dcdc9c6d0295c6db0c8933126098b14e05
• https://git.kernel.org/stable/c/d34c30bc994328d9cf6749b2e9a32aabd08fd076