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CVE-2026-98161

5.5 · MEDIUM

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 da…

Published Sep 25, 2026linuxCWE-754EPSS 0.11%

Overview

CVE-2026-98161 is a medium-severity vulnerability affecting linux linux_kernel. It was published on September 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 5.3, < 6.18.52Affected

References

Refgit.kernel.org/stable/c/22d1f4dcdc9c6d0295c6db0c8933126098b14e05Refgit.kernel.org/stable/c/72561ca1ab96f0f0f32737a6171641e05a318538Refgit.kernel.org/stable/c/770a90c2127220f0fc194ce909ad4f0842e141cbRefgit.kernel.org/stable/c/c644a2f8fef5618fcf453c591177700fd07dd024Refgit.kernel.org/stable/c/d34c30bc994328d9cf6749b2e9a32aabd08fd076

How CyberStrike helps

Frequently asked questions

What is CVE-2026-98161?

CVE-2026-98161 is a medium-severity vulnerability affecting linux linux_kernel. It was published on September 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-98161?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-98161?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-98161?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-98161 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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