CVE-2022-49863 (GCVE-0-2022-49863)
Vulnerability from cvelistv5
Published
2025-05-01 14:10
Modified
2026-05-23 15:23
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: can: af_can: fix NULL pointer dereference in can_rx_register() It causes NULL pointer dereference when testing as following: (a) use syscall(__NR_socket, 0x10ul, 3ul, 0) to create netlink socket. (b) use syscall(__NR_sendmsg, ...) to create bond link device and vxcan link device, and bind vxcan device to bond device (can also use ifenslave command to bind vxcan device to bond device). (c) use syscall(__NR_socket, 0x1dul, 3ul, 1) to create CAN socket. (d) use syscall(__NR_bind, ...) to bind the bond device to CAN socket. The bond device invokes the can-raw protocol registration interface to receive CAN packets. However, ml_priv is not allocated to the dev, dev_rcv_lists is assigned to NULL in can_rx_register(). In this case, it will occur the NULL pointer dereference issue. The following is the stack information: BUG: kernel NULL pointer dereference, address: 0000000000000008 PGD 122a4067 P4D 122a4067 PUD 1223c067 PMD 0 Oops: 0000 [#1] PREEMPT SMP RIP: 0010:can_rx_register+0x12d/0x1e0 Call Trace: <TASK> raw_enable_filters+0x8d/0x120 raw_enable_allfilters+0x3b/0x130 raw_bind+0x118/0x4f0 __sys_bind+0x163/0x1a0 __x64_sys_bind+0x1e/0x30 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK>
References
Impacted products
Vendor Product Version
Linux Linux Version: 4ac1feff6ea6495cbfd336f4438a6c6d140544a6
Version: 1a5751d58b14195f763b8c1d9ef33fb8a93e95e7
Version: 4e096a18867a5a989b510f6999d9c6b6622e8f7b
Version: 4e096a18867a5a989b510f6999d9c6b6622e8f7b
Version: 4e096a18867a5a989b510f6999d9c6b6622e8f7b
Version: 96340078d50a54f6a1252c62596bc44321c8bff9
Version: 5.4.110   ≤
Version: 5.10.28   ≤
Version: 5.11.12   ≤
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          "value": "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"
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    "datePublished": "2025-05-01T14:10:16.403Z",
    "dateReserved": "2025-05-01T14:05:17.236Z",
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