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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2022-50206 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/04549063d5701976034d8c2bfda3d3a8cbf0409f kernel.org Patch 
https://git.kernel.org/stable/c/07022e07017ee5540f5559b0aeb916e8383c1e1a kernel.org Patch 
https://git.kernel.org/stable/c/353b4673d01c512303c45cf2346f630cda73b5c9 kernel.org Patch 
https://git.kernel.org/stable/c/6a2fd114678d7fc1b5a0f8865ae98f1c17787455 kernel.org Patch 
https://git.kernel.org/stable/c/9d5fec6ba2e4117d196a8259ab54615ffe562460 kernel.org Patch 
https://git.kernel.org/stable/c/af483947d472eccb79e42059276c4deed76f99a6 kernel.org Patch 
https://git.kernel.org/stable/c/b51881b1da57fe9877125dfdd0aac5172958fcfd kernel.org Patch 
https://git.kernel.org/stable/c/cc69ef95988b9ef2fc730ec452a7441efb90ef5e kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-50206
NVD Published Date:
06/18/2025
NVD Last Modified:
11/19/2025
Source:
kernel.org