CVE-2022-50206

MEDIUM EPSS 9.8%
Published Jun 18, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jun 18, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
9.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel* <4.14.291
linuxlinux_kernel*≥4.15  –  <4.19.256
linuxlinux_kernel*≥4.20  –  <5.4.211
linuxlinux_kernel*≥5.5  –  <5.10.137
linuxlinux_kernel*≥5.11  –  <5.15.61
linuxlinux_kernel*≥5.16  –  <5.18.18
linuxlinux_kernel*≥5.19  –  <5.19.2

References 8

  • git.kernel.org https://git.kernel.org/stable/c/04549063d5701976034d8c2bfda3d3a8cbf0409f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/07022e07017ee5540f5559b0aeb916e8383c1e1a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/353b4673d01c512303c45cf2346f630cda73b5c9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6a2fd114678d7fc1b5a0f8865ae98f1c17787455
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9d5fec6ba2e4117d196a8259ab54615ffe562460
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af483947d472eccb79e42059276c4deed76f99a6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b51881b1da57fe9877125dfdd0aac5172958fcfd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cc69ef95988b9ef2fc730ec452a7441efb90ef5e
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/04549063d5701976034d8c2bfda3d3a8cbf0409f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/07022e07017ee5540f5559b0aeb916e8383c1e1a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/353b4673d01c512303c45cf2346f630cda73b5c9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6a2fd114678d7fc1b5a0f8865ae98f1c17787455
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9d5fec6ba2e4117d196a8259ab54615ffe562460
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/af483947d472eccb79e42059276c4deed76f99a6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b51881b1da57fe9877125dfdd0aac5172958fcfd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cc69ef95988b9ef2fc730ec452a7441efb90ef5e
    Patch