{"id":"CVE-2026-89445","title":"kernel: iommufd: Fix UAF in selftest IOPF reporting (CVE-2026-89445)","summary":"A flaw was found in the Linux kernel's iommufd selftest component. This Use-After-Free (UAF) vulnerability occurs when the TRIGGER_IOPF function borrows an attach handle without proper synchronization during a PASID detach operation. A con…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-825","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":"2026-09-18","sourceUpdated":"2026-09-18T19:49:16+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89445.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89445.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89445"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532116"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89445"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89445"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89445.mbox"},{"url":"https://git.kernel.org/stable/c/8c07df7cdfcf52f1ff276c588612aabc6c6b8399"},{"url":"https://git.kernel.org/stable/c/cab2895729516799384d48560e6fca105fb3f927"},{"url":"https://git.kernel.org/stable/c/e27e90bde68b2ab92e63ed19caad1ef57188bea0"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00161,"epssPercentile":0.05756,"scores":{"vendor":7,"cna":8.8},"ingestedAt":"2026-09-14T15:23:07.475Z","slug":"CVE-2026-89445","body":"## Overview\n\nA flaw was found in the Linux kernel's iommufd selftest component. This Use-After-Free (UAF) vulnerability occurs when the TRIGGER_IOPF function borrows an attach handle without proper synchronization during a PASID detach operation. A concurrent device fault report can then access memory that has been freed, leading to system instability, potential information disclosure, or arbitrary code execution.\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 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89445.json)\n\n**kernel: iommufd: Fix UAF in selftest IOPF reporting** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.\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\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207004,"id":"CVE-2026-89445","ts":1789749736458,"field":"cvss","old":"4.1","new":"7"},{"seq":207003,"id":"CVE-2026-89445","ts":1789749736458,"field":"severity","old":"medium","new":"high"},{"seq":202909,"id":"CVE-2026-89445","ts":1789403732903,"field":"cvss","old":"8.8","new":"4.1"},{"seq":202908,"id":"CVE-2026-89445","ts":1789403732903,"field":"severity","old":"high","new":"medium"},{"seq":198057,"id":"CVE-2026-89445","ts":1789384321583,"field":"cvss","old":"4.1","new":"8.8"},{"seq":198056,"id":"CVE-2026-89445","ts":1789384321583,"field":"severity","old":"medium","new":"high"},{"seq":183552,"id":"CVE-2026-89445","ts":1789356675855,"field":"cvss","old":"8.8","new":"4.1"},{"seq":183551,"id":"CVE-2026-89445","ts":1789356675855,"field":"severity","old":"high","new":"medium"},{"seq":153228,"id":"CVE-2026-89445","ts":1789285349636,"field":"cvss","old":null,"new":"8.8"},{"seq":153227,"id":"CVE-2026-89445","ts":1789285349636,"field":"severity","old":"none","new":"high"},{"seq":147728,"id":"CVE-2026-89445","ts":1789270212060,"field":"cvss","old":null,"new":"4.1"},{"seq":147727,"id":"CVE-2026-89445","ts":1789270212060,"field":"severity","old":"none","new":"medium"},{"seq":109492,"id":"CVE-2026-89445","ts":1789183732123,"field":"cvss","old":null,"new":"4.1"},{"seq":109491,"id":"CVE-2026-89445","ts":1789183732123,"field":"severity","old":"none","new":"medium"}]}