{"id":"CVE-2026-89451","title":"kernel: iommu/sva: Set handle->dev before the SVA handle is visible (CVE-2026-89451)","summary":"A flaw was found in the Linux kernel's IOMMU (Input/Output Memory Management Unit) SVA (Shared Virtual Addressing) component. A race condition during the attachment of an SVA handle can lead to a situation where a device pointer is not pro…","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-476","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-17","sourceUpdated":"2026-09-17T19:17:01+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89451.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89451.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89451"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532460"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89451"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89451"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89451.mbox"},{"url":"https://git.kernel.org/stable/c/37a96a30617a4c96f048a5874c00509bc4fe4d85"},{"url":"https://git.kernel.org/stable/c/530f8f9c3546cb3ebee1b135375aaee08a073ebb"},{"url":"https://git.kernel.org/stable/c/968e9a1f71140c86dc4092f6b361e997923f3813"},{"url":"https://git.kernel.org/stable/c/bcffb1c75da8fc9d51168ff9f09d471c26507912"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.002,"epssPercentile":0.10104,"ingestedAt":"2026-09-14T00:35:28.531Z","slug":"CVE-2026-89451","body":"## Overview\n\nA flaw was found in the Linux kernel's IOMMU (Input/Output Memory Management Unit) SVA (Shared Virtual Addressing) component. A race condition during the attachment of an SVA handle can lead to a situation where a device pointer is not properly initialized. A local attacker could exploit this flaw by triggering concurrent bind operations, potentially causing a null pointer dereference and a system crash, resulting in a Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89451.json)\n\n**kernel: iommu/sva: Set handle->dev before the SVA handle is visible** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-17.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":206994,"id":"CVE-2026-89451","ts":1789749735944,"field":"cvss","old":"4.1","new":"5.5"},{"seq":203957,"id":"CVE-2026-89451","ts":1789490230794,"field":"cvss","old":null,"new":"4.1"},{"seq":203956,"id":"CVE-2026-89451","ts":1789490230794,"field":"severity","old":"none","new":"medium"},{"seq":147159,"id":"CVE-2026-89451","ts":1789270197762,"field":"cvss","old":null,"new":"4.1"},{"seq":147158,"id":"CVE-2026-89451","ts":1789270197762,"field":"severity","old":"none","new":"medium"},{"seq":108918,"id":"CVE-2026-89451","ts":1789183729535,"field":"cvss","old":null,"new":"4.1"},{"seq":108917,"id":"CVE-2026-89451","ts":1789183729535,"field":"severity","old":"none","new":"medium"}]}