{"id":"CVE-2024-26786","summary":"iommufd: Fix iopt_access_list_id overwrite bug","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Fix iopt_access_list_id overwrite bug\n\nSyzkaller reported the following WARN_ON:\n  WARNING: CPU: 1 PID: 4738 at drivers/iommu/iommufd/io_pagetable.c:1360\n\n  Call Trace:\n   iommufd_access_change_ioas+0x2fe/0x4e0\n   iommufd_access_destroy_object+0x50/0xb0\n   iommufd_object_remove+0x2a3/0x490\n   iommufd_object_destroy_user\n   iommufd_access_destroy+0x71/0xb0\n   iommufd_test_staccess_release+0x89/0xd0\n   __fput+0x272/0xb50\n   __fput_sync+0x4b/0x60\n   __do_sys_close\n   __se_sys_close\n   __x64_sys_close+0x8b/0x110\n   do_syscall_x64\n\nThe mismatch between the access pointer in the list and the passed-in\npointer is resulting from an overwrite of access-\u003eiopt_access_list_id, in\niopt_add_access(). Called from iommufd_access_change_ioas() when\nxa_alloc() succeeds but iopt_calculate_iova_alignment() fails.\n\nAdd a new_id in iopt_add_access() and only update iopt_access_list_id when\nreturning successfully.","modified":"2026-04-02T10:05:53.163441Z","published":"2024-04-04T08:20:19.109Z","related":["SUSE-SU-2024:2135-1","SUSE-SU-2024:2203-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20249-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26786.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/9526a46cc0c378d381560279bea9aa34c84298a0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/aeb004c0cd6958e910123a1607634401009c9539"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f1fb745ee0a6fe43f1d84ec369c7e6af2310fda9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26786.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26786"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"9227da7816dd1a42e20d41e2244cb63c205477ca"},{"fixed":"f1fb745ee0a6fe43f1d84ec369c7e6af2310fda9"},{"fixed":"9526a46cc0c378d381560279bea9aa34c84298a0"},{"fixed":"aeb004c0cd6958e910123a1607634401009c9539"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26786.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}