{"id":"CVE-2026-98282","title":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba\n\nThe commit b1af23d836f8 (\"KVM: PPC: iommu: Unify TCE checking\") unified\nIOBA parameter checking acro…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba\n\nThe commit b1af23d836f8 (\"KVM: PPC: iommu: Unify TCE checking\") unified\nIOBA parameter checking acro…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= b1af23d836f811137d504d14d4cbdd01929dec34 < 98d8dcc4ebd10523507d4478e148809a7771a213","Linux >= b1af23d836f811137d504d14d4cbdd01929dec34 < 9fd9c9bbb05417f468a11fb6d145d7ff61f4a868","Linux >= b1af23d836f811137d504d14d4cbdd01929dec34 < 3776bf56e06980e8a12c8c0565d9e6ac44965f03","Linux >= b1af23d836f811137d504d14d4cbdd01929dec34 < d6a1779129d936bc1fbab80181165da544eab736","Linux >= b1af23d836f811137d504d14d4cbdd01929dec34 < d48ceb6e1a6915c7bac4f902554a1047365cdff2","Linux >= b1af23d836f811137d504d14d4cbdd01929dec34 < 0543813753ef5cfbd6fa96694f7acf783fa01af7","Linux >= b1af23d836f811137d504d14d4cbdd01929dec34 < 314091243159f8e3749bc719bb129f423f72fd86","Linux >= b1af23d836f811137d504d14d4cbdd01929dec34 < 0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71","Linux 4.12"],"published":"2026-10-06","updated":"2026-10-07","sourceUpdated":"2026-10-07T07:17:07.920","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98282","references":[{"url":"https://git.kernel.org/stable/c/0543813753ef5cfbd6fa96694f7acf783fa01af7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/314091243159f8e3749bc719bb129f423f72fd86","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3776bf56e06980e8a12c8c0565d9e6ac44965f03","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/98d8dcc4ebd10523507d4478e148809a7771a213","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9fd9c9bbb05417f468a11fb6d145d7ff61f4a868","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d48ceb6e1a6915c7bac4f902554a1047365cdff2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d6a1779129d936bc1fbab80181165da544eab736","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98282.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98282"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546376"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98282"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98282"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98282.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00129,"epssPercentile":0.02549,"ingestedAt":"2026-10-06T08:50:17.420Z","cwe":["CWE-190"],"scores":{"nvd":8.8,"vendor":7,"cna":8.8},"slug":"CVE-2026-98282","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba\n\nThe commit b1af23d836f8 (\"KVM: PPC: iommu: Unify TCE checking\") unified\nIOBA parameter checking across KVM and VFIO into iommu_tce_check_ioba().\nWhile doing so, the passed in argument npages is ignored and constant\nvalue '1' is used leaving out a possible overflow as the callers can\nlegitimately be using npages > 1 for H_STUFF_TCE or H_PUT_TCE_INDIRECT\ncases.\n\nFix this by accounting for 'npages', checking for arithmetic overflow,\nand verifying that the entire requested range (ioba - offset + npages)\ndoes not exceed the table capacity 'size'.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-10 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98282.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":217310,"id":"CVE-2026-98282","ts":1791361311822,"field":"cvss","old":null,"new":"8.8"},{"seq":217309,"id":"CVE-2026-98282","ts":1791361311822,"field":"severity","old":"none","new":"high"}]}