CVE-2022-49298 [Medium] | Security Vulnerability in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8712: fix uninit-value in r871xu_drv_init() When 'tmpU1b' returns from r8712_read8(padapter, EE_9346CR) is 0, 'mac[6]' will not be initialized. BUG: KMSAN: uninit-value in r871xu_drv_init+0x2d54/0x3070 drivers/staging/rtl8712/usb_intf.c:541 r871xu_drv_init+0x2d54/0x3070 drivers/staging/rtl8712/usb_intf.c:541 usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396 really_probe+0x653/0x14b0 drivers/base/dd.c:596 __driver_probe_device+0x3e9/0x530 drivers/base/dd.c:752 driver_probe_device drivers/base/dd.c:782 [inline] __device_attach_driver+0x79f/0x1120 drivers/base/dd.c:899 bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427 __device_attach+0x593/0x8e0 drivers/base/dd.c:970 device_initial_probe+0x4a/0x60 drivers/base/dd.c:1017 bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487 device_add+0x1fff/0x26e0 drivers/base/core.c:3405 usb_set_configuration+0x37e9/0x3ed0 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x13c/0x300 drivers/usb/core/generic.c:238 usb_probe_device+0x309/0x570 drivers/usb/core/driver.c:293 really_probe+0x653/0x14b0 drivers/base/dd.c:596 __driver_probe_device+0x3e9/0x530 drivers/base/dd.c:752 driver_probe_device drivers/base/dd.c:782 [inline] __device_attach_driver+0x79f/0x1120 drivers/base/dd.c:899 bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427 __device_attach+0x593/0x8e0 drivers/base/dd.c:970 device_initial_probe+0x4a/0x60 drivers/base/dd.c:1017 bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487 device_add+0x1fff/0x26e0 drivers/base/core.c:3405 usb_new_device+0x1b8e/0x2950 drivers/usb/core/hub.c:2566 hub_port_connect drivers/usb/core/hub.c:5358 [inline] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] port_event drivers/usb/core/hub.c:5660 [inline] hub_event+0x58e3/0x89e0 drivers/usb/core/hub.c:5742 process_one_work+0xdb6/0x1820 kernel/workqueue.c:2307 worker_thread+0x10b3/0x21e0 kernel/workqueue.c:2454 kthread+0x3c7/0x500 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Local variable mac created at: r871xu_drv_init+0x1771/0x3070 drivers/staging/rtl8712/usb_intf.c:394 usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396 KMSAN: uninit-value in r871xu_drv_init https://syzkaller.appspot.com/bug?id=3cd92b1d85428b128503bfa7a250294c9ae00bd8

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-04-15	0.06%	0.02%	-0.04%
2	2025-03-17	0.04%	0.06%	+0.02%
3	2025-02-27	—	0.04%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-04-15

0.06%

0.02%

-0.04%

2025-03-17

0.04%

0.06%

+0.02%

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]
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	134c704f-9b21-4f2e-91b3-4a467353bcc0

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]

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

134c704f-9b21-4f2e-91b3-4a467353bcc0

OS Trackers for CVE-2022-49298

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2022-49298 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-2022-49298
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2022-49298
`suse`	medium	—	https://www.suse.com/security/cve/CVE-2022-49298/
`ubuntu`	medium	CVE-2022-49298 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-2022-49298

Affected software / configurations for CVE-2022-49298

Vendor	Product	Version	Raw CPE
linux	linux_kernel	< 4.9.318	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 4.10, < 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-2022-49298

URL	Tags
https://git.kernel.org/stable/c/0458e5428e5e959d201a40ffe71d762a79ecedc4	Patch
https://git.kernel.org/stable/c/0b7371a22489cbb2e8e826ca03fb5ce92afb04fe	Patch
https://git.kernel.org/stable/c/277faa442fe0c59f418ac53f47a78e1266addd65	Patch
https://git.kernel.org/stable/c/52a0d88c328098b4e9fb8f2f3877fec0eff4104b	Patch
https://git.kernel.org/stable/c/70df04433fd351ba72bc635bd0b5fe443d9ac964	Patch
https://git.kernel.org/stable/c/76a964ad0ea8f2b10abd69a7532e174a28258283	Patch
https://git.kernel.org/stable/c/a6535d00a9d54ce1c2a8d86a85001ffb6844f9b2	Patch
https://git.kernel.org/stable/c/f36e754a1f0bafb9feeea63463de78080acb6de0	Patch
https://git.kernel.org/stable/c/ff727ab0b7d7a56b5ef281f12abd00c4b85894e9	Patch

URL

CVE-2022-49298 | staging: rtl8712: fix uninit-value in r871xu_drv_init()

Exploit prediction scoring system (EPSS) score for CVE-2022-49298

Common vulnerability scoring system (CVSS) metrics for CVE-2022-49298

Weakness enumeration for CVE-2022-49298

OS Trackers for CVE-2022-49298

Affected software / configurations for CVE-2022-49298

References for CVE-2022-49298