{"id":"CVE-2022-49863","summary":"can: af_can: fix NULL pointer dereference in can_rx_register()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: af_can: fix NULL pointer dereference in can_rx_register()\n\nIt causes NULL pointer dereference when testing as following:\n(a) use syscall(__NR_socket, 0x10ul, 3ul, 0) to create netlink socket.\n(b) use syscall(__NR_sendmsg, ...) to create bond link device and vxcan\n    link device, and bind vxcan device to bond device (can also use\n    ifenslave command to bind vxcan device to bond device).\n(c) use syscall(__NR_socket, 0x1dul, 3ul, 1) to create CAN socket.\n(d) use syscall(__NR_bind, ...) to bind the bond device to CAN socket.\n\nThe bond device invokes the can-raw protocol registration interface to\nreceive CAN packets. However, ml_priv is not allocated to the dev,\ndev_rcv_lists is assigned to NULL in can_rx_register(). In this case,\nit will occur the NULL pointer dereference issue.\n\nThe following is the stack information:\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nPGD 122a4067 P4D 122a4067 PUD 1223c067 PMD 0\nOops: 0000 [#1] PREEMPT SMP\nRIP: 0010:can_rx_register+0x12d/0x1e0\nCall Trace:\n\u003cTASK\u003e\nraw_enable_filters+0x8d/0x120\nraw_enable_allfilters+0x3b/0x130\nraw_bind+0x118/0x4f0\n__sys_bind+0x163/0x1a0\n__x64_sys_bind+0x1e/0x30\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\u003c/TASK\u003e","modified":"2026-04-03T13:14:31.673465178Z","published":"2025-05-01T14:10:16.403Z","related":["SUSE-SU-2025:01918-1","SUSE-SU-2025:01966-1","SUSE-SU-2025:02173-1","SUSE-SU-2025:02262-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49863.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/261178a1c2623077d62e374a75c195e6c99a6f05"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8aa59e355949442c408408c2d836e561794c40a1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a8055677b054bc2bb78beb1080fdc2dc5158c2fe"},{"type":"WEB","url":"https://git.kernel.org/stable/c/afab4655750fcb3fca359bc7d7214e3d634cdf9c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49863.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49863"},{"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":"4ac1feff6ea6495cbfd336f4438a6c6d140544a6"},{"fixed":"afab4655750fcb3fca359bc7d7214e3d634cdf9c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1a5751d58b14195f763b8c1d9ef33fb8a93e95e7"},{"fixed":"d68fa77ee3d03bad6fe84e89759ddf7005f9e9c6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4e096a18867a5a989b510f6999d9c6b6622e8f7b"},{"fixed":"261178a1c2623077d62e374a75c195e6c99a6f05"},{"fixed":"a8055677b054bc2bb78beb1080fdc2dc5158c2fe"},{"fixed":"8aa59e355949442c408408c2d836e561794c40a1"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"96340078d50a54f6a1252c62596bc44321c8bff9"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49863.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"}]}