powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98282
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:18 UTC
Updated2026-10-07 07:17:07 UTC
DescriptionIn 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'.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.001840000 probability, percentile 0.073050000 (date 2026-10-06)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b1af23d836f811137d504d14d4cbdd01929dec34 98d8dcc4ebd10523507d4478e148809a7771a213 git Not specified
CNA Linux Linux affected b1af23d836f811137d504d14d4cbdd01929dec34 9fd9c9bbb05417f468a11fb6d145d7ff61f4a868 git Not specified
CNA Linux Linux affected b1af23d836f811137d504d14d4cbdd01929dec34 3776bf56e06980e8a12c8c0565d9e6ac44965f03 git Not specified
CNA Linux Linux affected b1af23d836f811137d504d14d4cbdd01929dec34 d6a1779129d936bc1fbab80181165da544eab736 git Not specified
CNA Linux Linux affected b1af23d836f811137d504d14d4cbdd01929dec34 d48ceb6e1a6915c7bac4f902554a1047365cdff2 git Not specified
CNA Linux Linux affected b1af23d836f811137d504d14d4cbdd01929dec34 0543813753ef5cfbd6fa96694f7acf783fa01af7 git Not specified
CNA Linux Linux affected b1af23d836f811137d504d14d4cbdd01929dec34 314091243159f8e3749bc719bb129f423f72fd86 git Not specified
CNA Linux Linux affected b1af23d836f811137d504d14d4cbdd01929dec34 0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71 git Not specified
CNA Linux Linux affected 4.12 Not specified
CNA Linux Linux unaffected 4.12 semver Not specified
CNA Linux Linux unaffected 5.10.271 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.222 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.189 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.158 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.112 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.54 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/98d8dcc4ebd10523507d4478e148809a7771a213 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/314091243159f8e3749bc719bb129f423f72fd86 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d6a1779129d936bc1fbab80181165da544eab736 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d48ceb6e1a6915c7bac4f902554a1047365cdff2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3776bf56e06980e8a12c8c0565d9e6ac44965f03 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9fd9c9bbb05417f468a11fb6d145d7ff61f4a868 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0543813753ef5cfbd6fa96694f7acf783fa01af7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report