CVE-2022-50206 [Medium] | Security Vulnerability in Linux Kernel

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.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-04-14	0.02%	0.05%	+0.03%
2	2025-06-18	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-04-14

0.02%

0.05%

+0.03%

2025-06-18

—

0.02%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.5	3.1	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.5

3.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

3.6

[email protected]

OS Trackers for CVE-2022-50206

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-50206 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2022-50206
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2022-50206
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2022-50206/
`ubuntu`	medium	CVE-2022-50206 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, released 157, ignored 148, not-affected 99, needed 1, needs-triage 1.	https://ubuntu.com/security/CVE-2022-50206

Affected software / configurations for CVE-2022-50206

Vendor	Product	Version	Raw CPE
linux	linux_kernel	< 4.14.291	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.15, < 4.19.256	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.20, < 5.4.211	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.137	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.61	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 5.18.18	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.19, < 5.19.2	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2022-50206

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

URL

CVE-2022-50206 | arm64: fix oops in concurrently setting insn_emulation sysctls

Exploit prediction scoring system (EPSS) score for CVE-2022-50206

Common vulnerability scoring system (CVSS) metrics for CVE-2022-50206

Weakness enumeration for CVE-2022-50206

OS Trackers for CVE-2022-50206

Affected software / configurations for CVE-2022-50206

References for CVE-2022-50206