CVE-2026-98161Hinoki check available

Data integrity loss via overwritten preflush errors

Published Sep 25, 2026 · Updated Sep 25, 2026

Data-integrity failure in Linux before 6.18.52 and 7.2.6 allows attackers to complete persistent-memory writes after a failed preflush. The nvdimm pmem_submit_bio() path copies bio data after REQ_PREFLUSH fails, then lets a successful REQ_FUA flush replace the recorded error. Exposure requires the PMEM path, a preflush failure, and a following FUA operation; the bio can report success despite losing the required persistence ordering.

CVSS severityUnavailable
Unscored
EPSS probability0.11%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Data-integrity failure in Linux before 6.18.52 and 7.2.6 allows attackers to complete persistent-memory writes after a failed preflush. The nvdimm pmem_submit_bio() path copies bio data after REQ_PREFLUSH fails, then lets a successful REQ_FUA flush replace the recorded error. Exposure requires the PMEM path, a preflush failure, and a following FUA operation; the bio can report success despite losing the required persistence ordering.

The record

CVE
CVE-2026-98161
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <6.18.52
  2. Affected versionversion=0 <7.2.6
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <72561ca1ab96f0f0f32737a6171641e05a318538
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <770a90c2127220f0fc194ce909ad4f0842e141cb
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c644a2f8fef5618fcf453c591177700fd07dd024

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0 <6.18.52; version=0 <7.2.6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <72561ca1ab96f0f0f32737a6171641e05a318538; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <770a90c2127220f0fc194ce909ad4f0842e141cb; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c644a2f8fef5618fcf453c591177700fd07dd024

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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