CVE-2026-98282
8.8 HIGHPublished 2026-10-06 · Updated 2026-10-07
AI risk analysis
- Summary
- The flaw involves an overflow validation issue in the iommu_tce_check_ioba function, which can lead to potential security risks if not properly addressed.
- Exploitability
- Exploitation is moderately difficult as it requires specific conditions, including the use of npages > 1 for certain cases, and the vulnerability is only present in the iommu_tce_check_ioba function.
- Blast radius
- If exploited, the impact could be significant, potentially leading to arbitrary code execution or system compromise, depending on the system's configuration and the privileges of the affected IOMMU.
- Detection
- No reliable host or network indicator is derivable from the published description.
- Prioritized remediation
- Upgrade to the version 5.19-rc1 or later, as the fix is included in this release.
Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.
NVD 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'.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
All references
- https://git.kernel.org/stable/c/0543813753ef5cfbd6fa96694f7acf783fa01af7
- https://git.kernel.org/stable/c/0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71
- https://git.kernel.org/stable/c/314091243159f8e3749bc719bb129f423f72fd86
- https://git.kernel.org/stable/c/3776bf56e06980e8a12c8c0565d9e6ac44965f03
- https://git.kernel.org/stable/c/98d8dcc4ebd10523507d4478e148809a7771a213
- https://git.kernel.org/stable/c/9fd9c9bbb05417f468a11fb6d145d7ff61f4a868
- https://git.kernel.org/stable/c/d48ceb6e1a6915c7bac4f902554a1047365cdff2
- https://git.kernel.org/stable/c/d6a1779129d936bc1fbab80181165da544eab736
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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