{"id":"CVE-2022-50206","title":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: fix oops in concurrently setting insn_emulation sysctls\n\nemulation_proc_handler() changes table->data for proc_dointvec_minmax\nand can generate the following Oop…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: fix oops in concurrently setting insn_emulation sysctls\n\nemulation_proc_handler() changes table->data for proc_dointvec_minmax\nand can generate the following Oop…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel < 4.14.291","linux_kernel >= 4.15, < 4.19.256","linux_kernel >= 4.20, < 5.4.211","linux_kernel >= 5.5, < 5.10.137","linux_kernel >= 5.11, < 5.15.61","linux_kernel >= 5.16, < 5.18.18","linux_kernel >= 5.19, < 5.19.2"],"patched":["linux_kernel 5.19.2"],"published":"2025-06-18","updated":"2026-08-15","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2022-50206","references":[{"url":"https://git.kernel.org/stable/c/04549063d5701976034d8c2bfda3d3a8cbf0409f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/07022e07017ee5540f5559b0aeb916e8383c1e1a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/353b4673d01c512303c45cf2346f630cda73b5c9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6a2fd114678d7fc1b5a0f8865ae98f1c17787455","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9d5fec6ba2e4117d196a8259ab54615ffe562460","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/af483947d472eccb79e42059276c4deed76f99a6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b51881b1da57fe9877125dfdd0aac5172958fcfd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cc69ef95988b9ef2fc730ec452a7441efb90ef5e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00241,"epssPercentile":0.15485,"ingestedAt":"2026-08-15T13:26:45.138Z","slug":"CVE-2022-50206","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\narm64: fix oops in concurrently setting insn_emulation sysctls\n\nemulation_proc_handler() changes table->data for proc_dointvec_minmax\nand can generate the following Oops if called concurrently with itself:\n\n | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n | Internal error: Oops: 96000006 [#1] SMP\n | Call trace:\n | update_insn_emulation_mode+0xc0/0x148\n | emulation_proc_handler+0x64/0xb8\n | proc_sys_call_handler+0x9c/0xf8\n | proc_sys_write+0x18/0x20\n | __vfs_write+0x20/0x48\n | vfs_write+0xe4/0x1d0\n | ksys_write+0x70/0xf8\n | __arm64_sys_write+0x20/0x28\n | el0_svc_common.constprop.0+0x7c/0x1c0\n | el0_svc_handler+0x2c/0xa0\n | el0_svc+0x8/0x200\n\nTo fix this issue, keep the table->data as &insn->current_mode and\nuse container_of() to retrieve the insn pointer. Another mutex is\nused to protect against the current_mode update but not for retrieving\ninsn_emulation as table->data is no longer changing.\n\n## Affected\n\n- `linux_kernel < 4.14.291`\n- `linux_kernel >= 4.15, < 4.19.256`\n- `linux_kernel >= 4.20, < 5.4.211`\n- `linux_kernel >= 5.5, < 5.10.137`\n- `linux_kernel >= 5.11, < 5.15.61`\n- `linux_kernel >= 5.16, < 5.18.18`\n- `linux_kernel >= 5.19, < 5.19.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.19.2`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}