{"id":"CVE-2026-89446","title":"iommufd: Release current IOAS on xa_store() failure","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Release current IOAS on xa_store() failure\n\niommufd_take_all_iova_rwsem() takes an object reference and the\niova_rwsem write lock before storing the IOAS in th…","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-772"],"vendor":"Linux","product":"Linux","affected":["Linux >= 051ae5aa73d782a8be2699a11e17c68f28b4e758 < 4c33d00ad9a911e87ea222986f732ce072e3aa26","Linux >= 051ae5aa73d782a8be2699a11e17c68f28b4e758 < 07b4fe1367f076886c1c47a19c70936138325087","Linux >= 051ae5aa73d782a8be2699a11e17c68f28b4e758 < 4ac2ce123824d5f885c868fa1f9f4d463141a2ba","Linux 6.13"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:46:55.828Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89446","references":[{"url":"https://git.kernel.org/stable/c/4c33d00ad9a911e87ea222986f732ce072e3aa26"},{"url":"https://git.kernel.org/stable/c/07b4fe1367f076886c1c47a19c70936138325087"},{"url":"https://git.kernel.org/stable/c/4ac2ce123824d5f885c868fa1f9f4d463141a2ba"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89446.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89446"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532091"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89446"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89446"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89446.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00206,"epssPercentile":0.10626,"ingestedAt":"2026-09-14T00:35:28.531Z","slug":"CVE-2026-89446","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Release current IOAS on xa_store() failure\n\niommufd_take_all_iova_rwsem() takes an object reference and the\niova_rwsem write lock before storing the IOAS in the temporary ioas_list\nxarray.\n\nIf xa_store() fails, the current IOAS has not been inserted into\nioas_list yet. iommufd_release_all_iova_rwsem() only unwinds IOAS\nobjects already present in that xarray, so it cannot release the current\nIOAS.\n\nRelease the current IOAS rwsem and object reference before unwinding the\npreviously stored entries.\n\n## Affected\n\n- `Linux >= 051ae5aa73d782a8be2699a11e17c68f28b4e758 < 4c33d00ad9a911e87ea222986f732ce072e3aa26`\n- `Linux >= 051ae5aa73d782a8be2699a11e17c68f28b4e758 < 07b4fe1367f076886c1c47a19c70936138325087`\n- `Linux >= 051ae5aa73d782a8be2699a11e17c68f28b4e758 < 4ac2ce123824d5f885c868fa1f9f4d463141a2ba`\n- `Linux 6.13`\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** · Low · 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-2026-89446.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":206998,"id":"CVE-2026-89446","ts":1789749736311,"field":"cvss","old":null,"new":"5.5"},{"seq":206997,"id":"CVE-2026-89446","ts":1789749736311,"field":"severity","old":"none","new":"medium"},{"seq":147730,"id":"CVE-2026-89446","ts":1789270212068,"field":"cvss","old":null,"new":"4.4"},{"seq":147729,"id":"CVE-2026-89446","ts":1789270212068,"field":"severity","old":"none","new":"medium"},{"seq":109482,"id":"CVE-2026-89446","ts":1789183732085,"field":"cvss","old":null,"new":"4.4"},{"seq":109481,"id":"CVE-2026-89446","ts":1789183732085,"field":"severity","old":"none","new":"medium"}]}