Linux Kernel up to 7.3-rc3 iommu iommu_tce_check_ioba npages integer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$5k-$25k0.26

Summaryinfo

A vulnerability has been found in Linux Kernel up to 7.3-rc3 and classified as very critical. Affected by this issue is the function iommu_tce_check_ioba of the component iommu. This manipulation of the argument npages causes integer overflow. This vulnerability is handled as CVE-2026-98282. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.3-rc3. It has been declared as very critical. Affected by this vulnerability is the function iommu_tce_check_ioba of the component iommu. The manipulation of the argument npages with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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'.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-98282 since 09/25/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/06/2026).

Upgrading to version 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8 or 7.3-rc4 eliminates this vulnerability. Applying the patch 98d8dcc4ebd10523507d4478e148809a7771a213/9fd9c9bbb05417f468a11fb6d145d7ff61f4a868/3776bf56e06980e8a12c8c0565d9e6ac44965f03/d6a1779129d936bc1fbab80181165da544eab736/d48ceb6e1a6915c7bac4f902554a1047365cdff2/0543813753ef5cfbd6fa96694f7acf783fa01af7/314091243159f8e3749bc719bb129f423f72fd86/0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.271/5.15.222/6.1.189/6.6.158/6.12.112/6.18.54/7.2.8/7.3-rc4
Patch: 98d8dcc4ebd10523507d4478e148809a7771a213/9fd9c9bbb05417f468a11fb6d145d7ff61f4a868/3776bf56e06980e8a12c8c0565d9e6ac44965f03/d6a1779129d936bc1fbab80181165da544eab736/d48ceb6e1a6915c7bac4f902554a1047365cdff2/0543813753ef5cfbd6fa96694f7acf783fa01af7/314091243159f8e3749bc719bb129f423f72fd86/0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71

Timelineinfo

09/25/2026 CVE reserved
10/06/2026 +11 days Advisory disclosed
10/06/2026 +0 days VulDB entry created
10/06/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-98282 (🔒)
GCVE (CVE): GCVE-0-2026-98282
GCVE (VulDB): GCVE-100-414151

Entryinfo

Created: 10/06/2026 13:12
Changes: 10/06/2026 13:12 (60)
Complete: 🔍
Cache ID: 216::103

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