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Vulnerability record · CVE-2026-98161 · published 25 September 2026

CVE-2026-98161: Linux kernel vulnerability

Linux · Linux Kernel

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.

5.5 CVSS 3.1 Medium EPSS 0.11% · top 98.5% CWE-754 · CWE-754
5.5CVSS 3.1 base score
0.11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
21 Oct 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/22d1f4dcdc9c6d0295c6db0c8933126098b14e05
https://git.kernel.org/stable/c/72561ca1ab96f0f0f32737a6171641e05a318538 Patch
https://git.kernel.org/stable/c/770a90c2127220f0fc194ce909ad4f0842e141cb Patch
https://git.kernel.org/stable/c/c644a2f8fef5618fcf453c591177700fd07dd024 Patch
https://git.kernel.org/stable/c/d34c30bc994328d9cf6749b2e9a32aabd08fd076

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Source: NIST National Vulnerability Database (record CVE-2026-98161), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.