{"id":"CVE-2023-54321","summary":"driver core: fix potential null-ptr-deref in device_add()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndriver core: fix potential null-ptr-deref in device_add()\n\nI got the following null-ptr-deref report while doing fault injection test:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000058\nCPU: 2 PID: 278 Comm: 37-i2c-ds2482 Tainted: G    B   W        N 6.1.0-rc3+\nRIP: 0010:klist_put+0x2d/0xd0\nCall Trace:\n \u003cTASK\u003e\n klist_remove+0xf1/0x1c0\n device_release_driver_internal+0x196/0x210\n bus_remove_device+0x1bd/0x240\n device_add+0xd3d/0x1100\n w1_add_master_device+0x476/0x490 [wire]\n ds2482_probe+0x303/0x3e0 [ds2482]\n\nThis is how it happened:\n\nw1_alloc_dev()\n  // The dev-\u003edriver is set to w1_master_driver.\n  memcpy(&dev-\u003edev, device, sizeof(struct device));\n  device_add()\n    bus_add_device()\n    dpm_sysfs_add() // It fails, calls bus_remove_device.\n\n    // error path\n    bus_remove_device()\n      // The dev-\u003edriver is not null, but driver is not bound.\n      __device_release_driver()\n        klist_remove(&dev-\u003ep-\u003eknode_driver) \u003c-- It causes null-ptr-deref.\n\n    // normal path\n    bus_probe_device() // It's not called yet.\n      device_bind_driver()\n\nIf dev-\u003edriver is set, in the error path after calling bus_add_device()\nin device_add(), bus_remove_device() is called, then the device will be\ndetached from driver. But device_bind_driver() is not called yet, so it\ncauses null-ptr-deref while access the 'knode_driver'. To fix this, set\ndev-\u003edriver to null in the error path before calling bus_remove_device().","modified":"2026-04-11T12:46:52.378847Z","published":"2025-12-30T12:34:14.793Z","related":["SUSE-SU-2026:0263-1","SUSE-SU-2026:0317-1","SUSE-SU-2026:0411-1","SUSE-SU-2026:0473-1","SUSE-SU-2026:0617-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54321.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/17982304806c5c10924e73f7ca5556e0d7378452"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2c59650d078b1b3f1ea50d5f8ee9fcc537dc02d3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7cf515bf9e8c2908dc170ecf2df117162a16c9c5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/97aa8fb74bbe9aaf4ed5962a784f73b071bd16bf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f6837f34a34973ef6600c08195ed300e24e97317"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54321.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54321"},{"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":"57eee3d23e8833ca18708b374c648235691942ba"},{"fixed":"97aa8fb74bbe9aaf4ed5962a784f73b071bd16bf"},{"fixed":"2c59650d078b1b3f1ea50d5f8ee9fcc537dc02d3"},{"fixed":"7cf515bf9e8c2908dc170ecf2df117162a16c9c5"},{"fixed":"17982304806c5c10924e73f7ca5556e0d7378452"},{"fixed":"f6837f34a34973ef6600c08195ed300e24e97317"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54321.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.26"},{"fixed":"5.10.249"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.99"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.2.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54321.json"}}],"schema_version":"1.7.5"}