{"id":"CVE-2023-53250","summary":"firmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle\n\nKASAN reported a null-ptr-deref error:\n\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nCPU: 0 PID: 1373 Comm: modprobe\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996)\nRIP: 0010:dmi_sysfs_entry_release\n...\nCall Trace:\n \u003cTASK\u003e\n kobject_put\n dmi_sysfs_register_handle (drivers/firmware/dmi-sysfs.c:540) dmi_sysfs\n dmi_decode_table (drivers/firmware/dmi_scan.c:133)\n dmi_walk (drivers/firmware/dmi_scan.c:1115)\n dmi_sysfs_init (drivers/firmware/dmi-sysfs.c:149) dmi_sysfs\n do_one_initcall (init/main.c:1296)\n ...\nKernel panic - not syncing: Fatal exception\nKernel Offset: 0x4000000 from 0xffffffff81000000\n---[ end Kernel panic - not syncing: Fatal exception ]---\n\nIt is because previous patch added kobject_put() to release the memory\nwhich will call  dmi_sysfs_entry_release() and list_del().\n\nHowever, list_add_tail(entry-\u003elist) is called after the error block,\nso the list_head is uninitialized and cannot be deleted.\n\nMove error handling to after list_add_tail to fix this.","modified":"2026-04-02T09:43:52.597437Z","published":"2025-09-15T14:46:20.011Z","related":["SUSE-SU-2025:03614-1","SUSE-SU-2025:03615-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3761-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53250.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/18e126e97c961f7a93823795c879d7c085fe5098"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d0492d1d934642bdfd2057acc1b56f4b57be465"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b4fe158259fb5fead52ff2b55841ec5c39492604"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e851996b32264e78a10863c2ac41a8689d7b9252"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53250.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53250"},{"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":"fdffa4ad8f6bf1ece877edfb807f2b2c729d8578"},{"fixed":"b4fe158259fb5fead52ff2b55841ec5c39492604"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"660ba678f9998aca6db74f2dd912fa5124f0fa31"},{"fixed":"e851996b32264e78a10863c2ac41a8689d7b9252"},{"fixed":"5d0492d1d934642bdfd2057acc1b56f4b57be465"},{"fixed":"18e126e97c961f7a93823795c879d7c085fe5098"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"a9bfb37d6ba7c376b0d53337a4c5f5ff324bd725"},{"last_affected":"ed38d04342dfbe9e5aca745c8b5eb4188a74f0ef"},{"last_affected":"c66cc3c62870a27ea8f060a7e4c1ad8d26dd3f0d"},{"last_affected":"a724634b2a49f6ff0177a9e19a5a92fc1545e1b7"},{"last_affected":"985706bd3bbeffc8737bc05965ca8d24837bc7db"},{"last_affected":"3ba359ebe914ac3f8c6c832b28007c14c39d3766"},{"last_affected":"ec752973aa721ee281d5441e497364637c626c7b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53250.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"}]}