{"id":"CVE-2021-47652","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()\n\nI got a null-ptr-deref report:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000000\n...\nRIP: 0010:fb_destroy_modelist+0x38/0x100\n...\nCall Trace:\n ufx_usb_probe.cold+0x2b5/0xac1 [smscufx]\n usb_probe_interface+0x1aa/0x3c0 [usbcore]\n really_probe+0x167/0x460\n...\n ret_from_fork+0x1f/0x30\n\nIf fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() will\nbe called to destroy modelist in the error handling path. But modelist\nhas not been initialized yet, so it will result in null-ptr-deref.\n\nInitialize modelist before calling fb_alloc_cmap() to fix this bug.","modified":"2026-03-15T22:43:16.603421Z","published":"2025-02-26T06:37:06.973Z","related":["SUSE-SU-2025:1027-1","SUSE-SU-2025:1176-1","SUSE-SU-2025:1183-1","SUSE-SU-2025:1194-1","SUSE-SU-2025:1241-1","SUSE-SU-2025:1263-1","SUSE-SU-2025:1293-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/d1b6a1f0c23b7164250479bf92e2893291dca539"},{"type":"FIX","url":"https://git.kernel.org/stable/c/da8b269cc0a2526ebeaccbe2484c999eb0f822cf"},{"type":"FIX","url":"https://git.kernel.org/stable/c/dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b"},{"type":"FIX","url":"https://git.kernel.org/stable/c/1791f487f877a9e83d81c8677bd3e7b259e7cb27"},{"type":"FIX","url":"https://git.kernel.org/stable/c/64ec3e678d76419f207b9cdd338dda438ca10b1c"},{"type":"FIX","url":"https://git.kernel.org/stable/c/c420b540db4b5d69de0a36d8b9d9a6a79a04f05a"},{"type":"FIX","url":"https://git.kernel.org/stable/c/d396c651e2b508b6179bb678cc029f3becbf5170"},{"type":"FIX","url":"https://git.kernel.org/stable/c/0fd28daec73525382e5c992db8743bf76e42cd5c"},{"type":"FIX","url":"https://git.kernel.org/stable/c/9280ef235b05e8f19f8bc6d547b992f0a0ef398d"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47652.json","unresolved_ranges":[{"events":[{"introduced":"3.2"},{"fixed":"4.9.311"}]},{"events":[{"introduced":"4.10"},{"fixed":"4.14.276"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.238"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.189"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.110"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.15.33"}]},{"events":[{"introduced":"5.16"},{"fixed":"5.16.19"}]},{"events":[{"introduced":"5.17"},{"fixed":"5.17.2"}]}]}}],"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"}]}