CVE-2022-50282 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: chardev: fix error handling in cdev_device_add() While doing fault injection test, I got the following report: ------------[ cut here ]------------ kobject: '(null)' (0000000039956980): is not initialized, yet kobject_put() is being called. WARNING: CPU: 3 PID: 6306 at kobject_put+0x23d/0x4e0 CPU: 3 PID: 6306 Comm: 283 Tainted: G W 6.1.0-rc2-00005-g307c1086d7c9 #1253 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:kobject_put+0x23d/0x4e0 Call Trace: <TASK> cdev_device_add+0x15e/0x1b0 __iio_device_register+0x13b4/0x1af0 [industrialio] __devm_iio_device_register+0x22/0x90 [industrialio] max517_probe+0x3d8/0x6b4 [max517] i2c_device_probe+0xa81/0xc00 When device_add() is injected fault and returns error, if dev->devt is not set, cdev_add() is not called, cdev_del() is not needed. Fix this by checking dev->devt in error path.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-09-16	—	0.03%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-09-16

—

0.03%

—

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-2022-50282

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-50282 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-2022-50282
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2022-50282
`suse`	high	—	https://www.suse.com/security/cve/CVE-2022-50282/
`ubuntu`	medium	CVE-2022-50282 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1414 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 1017, ignored 161, released 150, not-affected 80, needed 5, needs-triage 1.	https://ubuntu.com/security/CVE-2022-50282

Affected software / configurations for CVE-2022-50282

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 3.16.83, < 3.17	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.4.224, < 4.5	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.9.224, < 4.9.337	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.12, < 4.14.303	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.15, < 4.19.270	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.20, < 5.4.229	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.163	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.86	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 6.0.16	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.1, < 6.1.2	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2022-50282

URL	Tags
https://git.kernel.org/stable/c/11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797	Patch
https://git.kernel.org/stable/c/28dc61cc49c6e995121c6d86bef4b73df78dda80	Patch
https://git.kernel.org/stable/c/34d17b39bceef25e4cf9805cd59250ae05d0a139	Patch
https://git.kernel.org/stable/c/5d2146889fad4cb9e6c13e790d4cfd871486eca8	Patch
https://git.kernel.org/stable/c/6acf8597c5b04f455ee0649e11e5f3bcd28f381e	Patch
https://git.kernel.org/stable/c/85a5660491b507d33662b8e81c142e6041e642eb	Patch
https://git.kernel.org/stable/c/b5de1eac71fec1af7723f1083d23a24789fd795c	Patch
https://git.kernel.org/stable/c/c46db6088bccff5115674d583fef46ede80077a2	Patch
https://git.kernel.org/stable/c/d85b5247a79355b8432bfd9ac871f96117f750d4	Patch

URL

CVE-2022-50282 | chardev: fix error handling in cdev_device_add()

Exploit prediction scoring system (EPSS) score for CVE-2022-50282

Common vulnerability scoring system (CVSS) metrics for CVE-2022-50282

Weakness enumeration for CVE-2022-50282

OS Trackers for CVE-2022-50282

Affected software / configurations for CVE-2022-50282

References for CVE-2022-50282