cbcvebase.
CVE-2022-50206
published 2025-06-18

CVE-2022-50206: In the Linux kernel, the following vulnerability has been resolved: arm64: fix oops in concurrently setting insn_emulation sysctls emulation_proc_handler()…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.20%
10.4th percentile
In the Linux kernel, the following vulnerability has been resolved: arm64: fix oops in concurrently setting insn_emulation sysctls emulation_proc_handler() changes table->data for proc_dointvec_minmax and can generate the following Oops if called concurrently with itself: | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 | Internal error: Oops: 96000006 [#1] SMP | Call trace: | update_insn_emulation_mode+0xc0/0x148 | emulation_proc_handler+0x64/0xb8 | proc_sys_call_handler+0x9c/0xf8 | proc_sys_write+0x18/0x20 | __vfs_write+0x20/0x48 | vfs_write+0xe4/0x1d0 | ksys_write+0x70/0xf8 | __arm64_sys_write+0x20/0x28 | el0_svc_common.constprop.0+0x7c/0x1c0 | el0_svc_handler+0x2c/0xa0 | el0_svc+0x8/0x200 To fix this issue, keep the table->data as &insn->current_mode and use container_of() to retrieve the insn pointer. Another mutex is used to protect against the current_mode update but not for retrieving insn_emulation as table->data is no longer changing.

Affected

21 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.0.2-1 (bookworm)linux 6.0.2-1 (bookworm)
linuxlinux——
linuxlinux>= 0be7320a635c2e434e8b67e0e9474a85ceb421c4 < 9d5fec6ba2e4117d196a8259ab54615ffe5624609d5fec6ba2e4117d196a8259ab54615ffe562460
linuxlinux>= 0be7320a635c2e434e8b67e0e9474a85ceb421c4 < b51881b1da57fe9877125dfdd0aac5172958fcfdb51881b1da57fe9877125dfdd0aac5172958fcfd
linuxlinux>= 0be7320a635c2e434e8b67e0e9474a85ceb421c4 < 04549063d5701976034d8c2bfda3d3a8cbf0409f04549063d5701976034d8c2bfda3d3a8cbf0409f
linuxlinux>= 0be7320a635c2e434e8b67e0e9474a85ceb421c4 < 353b4673d01c512303c45cf2346f630cda73b5c9353b4673d01c512303c45cf2346f630cda73b5c9
linuxlinux>= 0be7320a635c2e434e8b67e0e9474a85ceb421c4 < cc69ef95988b9ef2fc730ec452a7441efb90ef5ecc69ef95988b9ef2fc730ec452a7441efb90ef5e
linuxlinux>= 0be7320a635c2e434e8b67e0e9474a85ceb421c4 < 6a2fd114678d7fc1b5a0f8865ae98f1c177874556a2fd114678d7fc1b5a0f8865ae98f1c17787455
linuxlinux>= 0be7320a635c2e434e8b67e0e9474a85ceb421c4 < 07022e07017ee5540f5559b0aeb916e8383c1e1a07022e07017ee5540f5559b0aeb916e8383c1e1a
linuxlinux>= 0be7320a635c2e434e8b67e0e9474a85ceb421c4 < af483947d472eccb79e42059276c4deed76f99a6af483947d472eccb79e42059276c4deed76f99a6
linuxlinux_kernel< 4.14.2914.14.291
linuxlinux_kernel>= 0 < 5.10.140-15.10.140-1
linuxlinux_kernel>= 0 < 6.0.2-16.0.2-1
linuxlinux_kernel>= 0 < 6.0.2-16.0.2-1
linuxlinux_kernel>= 0 < 6.0.2-16.0.2-1
linuxlinux_kernel>= 4.15 < 4.19.2564.19.256
linuxlinux_kernel>= 4.20 < 5.4.2115.4.211
linuxlinux_kernel>= 5.11 < 5.15.615.15.61
linuxlinux_kernel>= 5.16 < 5.18.185.18.18
linuxlinux_kernel>= 5.19 < 5.19.25.19.2
linuxlinux_kernel>= 5.5 < 5.10.1375.10.137

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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