CVE-2022-50206

MediumCVSS 5.5/10Last modified Aug 15, 2026

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

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

No affected versions have been published.

Timeline

Published
Jun 18, 2025
Last modified
Aug 15, 2026
NVD status
Analyzed

Related CVEs from 2022

CVE-2022-502075.5In the Linux kernel, the following vulnerability has been resolved: ARM: bcm: Fix refcount leak in bcm_kona_smc_init of_find_matching_nodeCVE-2022-502085.5In the Linux kernel, the following vulnerability has been resolved: soc: amlogic: Fix refcount leak in meson-secure-pwrc.c In meson_secureCVE-2022-502095.5In the Linux kernel, the following vulnerability has been resolved: meson-mx-socinfo: Fix refcount leak in meson_mx_socinfo_init of_find_mCVE-2022-502105.5In the Linux kernel, the following vulnerability has been resolved: MIPS: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK When CONFIG_CCVE-2022-502117.1In the Linux kernel, the following vulnerability has been resolved: md-raid10: fix KASAN warning There's a KASAN warning in raid10_remove_CVE-2022-502127.8In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: do not allow CHAIN_ID to refer to another table CVE-2022-502137.8In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: do not allow SET_ID to refer to another table WhCVE-2022-502147.8In the Linux kernel, the following vulnerability has been resolved: coresight: Clear the connection field properly coresight devices trackCVE-2022-502155.5In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Allow waiting for commands to complete on removed device WheCVE-2022-502175.5In the Linux kernel, the following vulnerability has been resolved: fuse: write inode in fuse_release() A race between write(2) and close(CVE-2022-502185.5In the Linux kernel, the following vulnerability has been resolved: iio: light: isl29028: Fix the warning in isl29028_remove() The driver CVE-2022-502197.8In the Linux kernel, the following vulnerability has been resolved: bpf: Fix KASAN use-after-free Read in compute_effective_progs Syzbot f
CVE-2022-50206: Medium severity, CVSS 5.5 | Vulnix