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CVE-2026-98282

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba The commit b1af23d836f8 ("KVM: PPC: iommu: Unify TCE checkin…

Published Oct 6, 2026EPSS 0.13%

Overview

CVE-2026-98282 is a high-severity vulnerability. It was published on October 6, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. 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:

powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba

The commit b1af23d836f8 ("KVM: PPC: iommu: Unify TCE checking") unified

IOBA parameter checking across KVM and VFIO into iommu_tce_check_ioba().

While doing so, the passed in argument npages is ignored and constant

value '1' is used leaving out a possible overflow as the callers can

legitimately be using npages > 1 for H_STUFF_TCE or H_PUT_TCE_INDIRECT

cases.

Fix this by accounting for 'npages', checking for arithmetic overflow,

and verifying that the entire requested range (ioba - offset + npages)

does not exceed the table capacity 'size'.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refgit.kernel.org/stable/c/0543813753ef5cfbd6fa96694f7acf783fa01af7Refgit.kernel.org/stable/c/0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71Refgit.kernel.org/stable/c/314091243159f8e3749bc719bb129f423f72fd86Refgit.kernel.org/stable/c/3776bf56e06980e8a12c8c0565d9e6ac44965f03Refgit.kernel.org/stable/c/98d8dcc4ebd10523507d4478e148809a7771a213Refgit.kernel.org/stable/c/9fd9c9bbb05417f468a11fb6d145d7ff61f4a868Refgit.kernel.org/stable/c/d48ceb6e1a6915c7bac4f902554a1047365cdff2Refgit.kernel.org/stable/c/d6a1779129d936bc1fbab80181165da544eab736

How CyberStrike helps

Frequently asked questions

What is CVE-2026-98282?

CVE-2026-98282 is a high-severity vulnerability. It was published on October 6, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-98282?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-98282?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2026-98282?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-98282 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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