CVE-2022-49308 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: extcon: Modify extcon device to be created after driver data is set Currently, someone can invoke the sysfs such as state_show() intermittently before dev_set_drvdata() is done. And it can be a cause of kernel Oops because of edev is Null at that time. So modified the driver registration to after setting drviver data. - Oops's backtrace. Backtrace: [<c067865c>] (state_show) from [<c05222e8>] (dev_attr_show) [<c05222c0>] (dev_attr_show) from [<c02c66e0>] (sysfs_kf_seq_show) [<c02c6648>] (sysfs_kf_seq_show) from [<c02c496c>] (kernfs_seq_show) [<c02c4938>] (kernfs_seq_show) from [<c025e2a0>] (seq_read) [<c025e11c>] (seq_read) from [<c02c50a0>] (kernfs_fop_read) [<c02c5064>] (kernfs_fop_read) from [<c0231cac>] (__vfs_read) [<c0231c5c>] (__vfs_read) from [<c0231ee0>] (vfs_read) [<c0231e34>] (vfs_read) from [<c0232464>] (ksys_read) [<c02323f0>] (ksys_read) from [<c02324fc>] (sys_read) [<c02324e4>] (sys_read) from [<c00091d0>] (__sys_trace_return)

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-10-22	0.05%	0.03%	-0.02%
2	2025-05-05	0.04%	0.05%	+0.01%
3	2025-02-27	—	0.04%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-10-22

0.05%

0.03%

-0.02%

2025-05-05

0.04%

0.05%

+0.01%

2025-02-27

—

0.04%

—

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-2022-49308

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-49308 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-2022-49308
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2022-49308
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2022-49308/
`ubuntu`	medium	CVE-2022-49308 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 151, ignored 149, not-affected 100, needed 5, needs-triage 1.	https://ubuntu.com/security/CVE-2022-49308

Affected software / configurations for CVE-2022-49308

Vendor	Product	Version	Raw CPE
linux	linux_kernel	< 4.14.283	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.15, < 4.19.247	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.20, < 5.4.198	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.5, < 5.10.122	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.11, < 5.15.47	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.16, < 5.17.15	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 5.18, < 5.18.4	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2022-49308

URL	Tags
https://git.kernel.org/stable/c/033ec4e7e59ae5e1ef1e8c10bc6552926044ed1c	Patch
https://git.kernel.org/stable/c/35ff1ac55d301efb3f467cf5426faaeb3452994b	Patch
https://git.kernel.org/stable/c/368e68ad6da4317fc4170e8d92b51c13d1bfe7a7	Patch
https://git.kernel.org/stable/c/5dcc2afe716d69f5112ce035cb14f007461ff189	Patch
https://git.kernel.org/stable/c/6e721f3ad0535b24f19a62420f4da95212cf069c	Patch
https://git.kernel.org/stable/c/abf3b222614f49f98e606fccdd269161c0d70204	Patch
https://git.kernel.org/stable/c/cb81ea998c461868d1168411a867d8ffee12f23f	Patch
https://git.kernel.org/stable/c/d472c78cc82999d07bd09193a6718016ce9cd386	Patch

URL

CVE-2022-49308 | extcon: Modify extcon device to be created after driver data is set

Exploit prediction scoring system (EPSS) score for CVE-2022-49308

Common vulnerability scoring system (CVSS) metrics for CVE-2022-49308

Weakness enumeration for CVE-2022-49308

OS Trackers for CVE-2022-49308

Affected software / configurations for CVE-2022-49308

References for CVE-2022-49308