{"id":"CVE-2026-89452","title":"kernel: iommu/msm: Unwind probe state on registration failure (CVE-2026-89452)","summary":"A flaw was found in the `iommu/msm` component of the Linux kernel. This vulnerability occurs when `msm_iommu_probe()` fails to properly unwind its probe state during registration, leaving a dangling list entry. A local attacker could poten…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-825","vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-15","sourceUpdated":"2026-09-15T12:24:04+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89452.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89452.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89452"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532496"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89452"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89452"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89452.mbox"},{"url":"https://git.kernel.org/stable/c/535a200220ca2c83bc8bf54bd2cbe045d6ee70c4"},{"url":"https://git.kernel.org/stable/c/7f7074a886c4a93e3d12076ce60a510a1ebe400c"},{"url":"https://git.kernel.org/stable/c/f532401be9312ecd166f616bb74a65b0b4c150fa"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.0018,"epssPercentile":0.07883,"scores":{"vendor":4.4,"cna":8.4},"ingestedAt":"2026-09-14T15:23:07.475Z","slug":"CVE-2026-89452","body":"## Overview\n\nA flaw was found in the `iommu/msm` component of the Linux kernel. This vulnerability occurs when `msm_iommu_probe()` fails to properly unwind its probe state during registration, leaving a dangling list entry. A local attacker could potentially exploit this to cause a dereference of the dangling list entry, leading to system instability or a denial of service.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89452.json)\n\n**kernel: iommu/msm: Unwind probe state on registration failure** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":203894,"id":"CVE-2026-89452","ts":1789490213261,"field":"cvss","old":"4.4","new":"5.5"},{"seq":202911,"id":"CVE-2026-89452","ts":1789403732911,"field":"cvss","old":"8.4","new":"4.4"},{"seq":202910,"id":"CVE-2026-89452","ts":1789403732911,"field":"severity","old":"high","new":"medium"},{"seq":198051,"id":"CVE-2026-89452","ts":1789384321557,"field":"cvss","old":"4.4","new":"8.4"},{"seq":198050,"id":"CVE-2026-89452","ts":1789384321557,"field":"severity","old":"medium","new":"high"},{"seq":183542,"id":"CVE-2026-89452","ts":1789356675813,"field":"cvss","old":"8.4","new":"4.4"},{"seq":183541,"id":"CVE-2026-89452","ts":1789356675813,"field":"severity","old":"high","new":"medium"},{"seq":153234,"id":"CVE-2026-89452","ts":1789285349662,"field":"cvss","old":null,"new":"8.4"},{"seq":153233,"id":"CVE-2026-89452","ts":1789285349662,"field":"severity","old":"none","new":"high"},{"seq":147119,"id":"CVE-2026-89452","ts":1789270195249,"field":"cvss","old":null,"new":"4.4"},{"seq":147118,"id":"CVE-2026-89452","ts":1789270195249,"field":"severity","old":"none","new":"medium"},{"seq":108872,"id":"CVE-2026-89452","ts":1789183729345,"field":"cvss","old":null,"new":"4.4"},{"seq":108871,"id":"CVE-2026-89452","ts":1789183729345,"field":"severity","old":"none","new":"medium"}]}