CVE-2026-98282

Out-of-range TCE operations via incomplete IOBA validation

Published Oct 6, 2026 · Updated Oct 6, 2026

Improper range validation in the PowerPC IOMMU of Linux allows guest OS users to submit out-of-range multi-page TCE operations. The iommu_tce_check_ioba function checks only one page instead of the supplied npages value and fails to reject an overflowing or oversized IOBA range. The KVM path requires a PowerPC guest issuing multi-page TCE hypercalls; the published record does not establish a specific disclosure, corruption, or crash outcome.

CVSS severityUnavailable
Unscored
EPSS probability0.14%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper range validation in the PowerPC IOMMU of Linux allows guest OS users to submit out-of-range multi-page TCE operations. The iommu_tce_check_ioba function checks only one page instead of the supplied npages value and fails to reject an overflowing or oversized IOBA range. The KVM path requires a PowerPC guest issuing multi-page TCE hypercalls; the published record does not establish a specific disclosure, corruption, or crash outcome.

The record

CVE
CVE-2026-98282
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 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=4.12
  2. Affected versionversion=b1af23d836f811137d504d14d4cbdd01929dec34 <0543813753ef5cfbd6fa96694f7acf783fa01af7
  3. Affected versionversion=b1af23d836f811137d504d14d4cbdd01929dec34 <0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71
  4. Affected versionversion=b1af23d836f811137d504d14d4cbdd01929dec34 <314091243159f8e3749bc719bb129f423f72fd86
  5. Affected versionversion=b1af23d836f811137d504d14d4cbdd01929dec34 <3776bf56e06980e8a12c8c0565d9e6ac44965f03
  6. Affected versionversion=b1af23d836f811137d504d14d4cbdd01929dec34 <98d8dcc4ebd10523507d4478e148809a7771a213
  7. Affected versionversion=b1af23d836f811137d504d14d4cbdd01929dec34 <9fd9c9bbb05417f468a11fb6d145d7ff61f4a868
  8. Affected versionversion=b1af23d836f811137d504d14d4cbdd01929dec34 <d48ceb6e1a6915c7bac4f902554a1047365cdff2
  9. Affected versionversion=b1af23d836f811137d504d14d4cbdd01929dec34 <d6a1779129d936bc1fbab80181165da544eab736

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=b1af23d836f811137d504d14d4cbdd01929dec34 <0543813753ef5cfbd6fa96694f7acf783fa01af7; version=b1af23d836f811137d504d14d4cbdd01929dec34 <0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71; version=b1af23d836f811137d504d14d4cbdd01929dec34 <314091243159f8e3749bc719bb129f423f72fd86; version=b1af23d836f811137d504d14d4cbdd01929dec34 <3776bf56e06980e8a12c8c0565d9e6ac44965f03; version=b1af23d836f811137d504d14d4cbdd01929dec34 <98d8dcc4ebd10523507d4478e148809a7771a213; version=b1af23d836f811137d504d14d4cbdd01929dec34 <9fd9c9bbb05417f468a11fb6d145d7ff61f4a868; version=b1af23d836f811137d504d14d4cbdd01929dec34 <d48ceb6e1a6915c7bac4f902554a1047365cdff2; version=b1af23d836f811137d504d14d4cbdd01929dec34 <d6a1779129d936bc1fbab80181165da544eab736

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)
Vectorlocal
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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