CVE-2026-98161

nvdimm: pmem: keep PREFLUSH before data writes

State: Published
Severity: Not scored
Published: Sep 25, 2026
Updated: Oct 21, 2026
Reserved: Sep 25, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c5d4355d10d414a96ca870b731756b89d068d57a to before 22d1f4dcdc9c6d0295c6db0c8933126098b14e05Affected c5d4355d10d414a96ca870b731756b89d068d57a to before d34c30bc994328d9cf6749b2e9a32aabd08fd076Affected c5d4355d10d414a96ca870b731756b89d068d57a to before 770a90c2127220f0fc194ce909ad4f0842e141cbAffected c5d4355d10d414a96ca870b731756b89d068d57a to before 72561ca1ab96f0f0f32737a6171641e05a318538Affected c5d4355d10d414a96ca870b731756b89d068d57a to before c644a2f8fef5618fcf453c591177700fd07dd024Affected
LinuxLinux	5.3Affected before 5.3Not affected 6.6.160 through 6.6.Not affected 6.12.112 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

c5d4355d10d414a96ca870b731756b89d068d57a to before 22d1f4dcdc9c6d0295c6db0c8933126098b14e05Affected
c5d4355d10d414a96ca870b731756b89d068d57a to before d34c30bc994328d9cf6749b2e9a32aabd08fd076Affected
c5d4355d10d414a96ca870b731756b89d068d57a to before 770a90c2127220f0fc194ce909ad4f0842e141cbAffected
c5d4355d10d414a96ca870b731756b89d068d57a to before 72561ca1ab96f0f0f32737a6171641e05a318538Affected
c5d4355d10d414a96ca870b731756b89d068d57a to before c644a2f8fef5618fcf453c591177700fd07dd024Affected

LinuxLinux

5.3Affected
before 5.3Not affected
6.6.160 through 6.6.*Not affected
6.12.112 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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