{"id":"CVE-2022-50206","summary":"arm64: fix oops in concurrently setting insn_emulation sysctls","details":"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-\u003edata 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-\u003edata as &insn-\u003ecurrent_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-\u003edata is no longer changing.","modified":"2026-04-03T13:14:47.115640Z","published":"2025-06-18T11:03:46.505Z","related":["SUSE-SU-2025:02264-1","SUSE-SU-2025:02321-1","SUSE-SU-2025:02322-1","SUSE-SU-2025:02334-1","SUSE-SU-2025:02537-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50206.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/04549063d5701976034d8c2bfda3d3a8cbf0409f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/07022e07017ee5540f5559b0aeb916e8383c1e1a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/353b4673d01c512303c45cf2346f630cda73b5c9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6a2fd114678d7fc1b5a0f8865ae98f1c17787455"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9d5fec6ba2e4117d196a8259ab54615ffe562460"},{"type":"WEB","url":"https://git.kernel.org/stable/c/af483947d472eccb79e42059276c4deed76f99a6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b51881b1da57fe9877125dfdd0aac5172958fcfd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc69ef95988b9ef2fc730ec452a7441efb90ef5e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50206.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50206"},{"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":"0be7320a635c2e434e8b67e0e9474a85ceb421c4"},{"fixed":"9d5fec6ba2e4117d196a8259ab54615ffe562460"},{"fixed":"b51881b1da57fe9877125dfdd0aac5172958fcfd"},{"fixed":"04549063d5701976034d8c2bfda3d3a8cbf0409f"},{"fixed":"353b4673d01c512303c45cf2346f630cda73b5c9"},{"fixed":"cc69ef95988b9ef2fc730ec452a7441efb90ef5e"},{"fixed":"6a2fd114678d7fc1b5a0f8865ae98f1c17787455"},{"fixed":"07022e07017ee5540f5559b0aeb916e8383c1e1a"},{"fixed":"af483947d472eccb79e42059276c4deed76f99a6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50206.json"}}],"schema_version":"1.7.5"}