{"id":"CVE-2026-89447","revision":"4963b6b6e2594c0e9db6c0c49a29f847","records":[{"revision":"4963b6b6e2594c0e9db6c0c49a29f847","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89447","aliases":[],"title":"iommufd: Avoid locking internal accesses during unmap","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Avoid locking internal accesses during unmap\n\niommufd_access_notify_unmap() skips internal accesses because they do\nnot have an external unmap callback to invoke.\n\nHowever, the current test calls iommufd_lock_obj() before checking\nwhether the access is internal. If iommufd_lock_obj() succeeds, the loop\nthen sees the internal access and continues, bypassing the matching\niommufd_put_object() used by the normal unmap path. This leaks the\nobject reference taken by iommufd_lock_obj().\n\nCheck for internal accesses first so skipped entries are never locked.","state":0,"publishedAt":"2026-09-11T19:43:14.094+00:00","modifiedAt":"2026-10-19T08:46:56.784+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/iommu/iommufd/device.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0\",\n                            \"lessThan\": \"436189ee4bb2c7c993b945d68570dd38c3e4349e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0\",\n                            \"lessThan\": \"50a66a63d1c841ae6b28a4551f642c1bba4c9529\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0\",\n                            \"lessThan\": \"0dbcdf4473a614adbd732d567c9b39ac0e040e0c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/iommu/iommufd/device.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.17\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.17\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/436189ee4bb2c7c993b945d68570dd38c3e4349e","https://git.kernel.org/stable/c/50a66a63d1c841ae6b28a4551f642c1bba4c9529","https://git.kernel.org/stable/c/0dbcdf4473a614adbd732d567c9b39ac0e040e0c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89447","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89447","identifiers":["CVE-2026-89447"]},"retained":false,"historicalAffected":[]}],"coverage":[]}