CVE-2022-49298

staging: rtl8712: fix uninit-value in r871xu_drv_init()

State: Published
Severity: 5.5 Medium
Published: Feb 26, 2025
Updated: May 11, 2026
Reserved: Feb 26, 2025

Description

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

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-908 Use of Uninitialized Resource

Affected Products

Product	Versions
LinuxLinux	2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 0b7371a22489cbb2e8e826ca03fb5ce92afb04feAffected 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 277faa442fe0c59f418ac53f47a78e1266addd65Affected 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before a6535d00a9d54ce1c2a8d86a85001ffb6844f9b2Affected 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 52a0d88c328098b4e9fb8f2f3877fec0eff4104bAffected 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before ff727ab0b7d7a56b5ef281f12abd00c4b85894e9Affected 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before f36e754a1f0bafb9feeea63463de78080acb6de0Affected 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 76a964ad0ea8f2b10abd69a7532e174a28258283Affected 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 70df04433fd351ba72bc635bd0b5fe443d9ac964Affected 2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 0458e5428e5e959d201a40ffe71d762a79ecedc4Affected
LinuxLinux	2.6.37Affected before 2.6.37Not affected 4.9.318 through 4.9.Not affected 4.14.283 through 4.14.Not affected 4.19.247 through 4.19.Not affected 5.4.198 through 5.4.Not affected 5.10.122 through 5.10.Not affected 5.15.47 through 5.15.Not affected 5.17.15 through 5.17.Not affected 5.18.4 through 5.18.Not affected 5.19 and laterNot affected

Product

Versions

LinuxLinux

2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 0b7371a22489cbb2e8e826ca03fb5ce92afb04feAffected
2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 277faa442fe0c59f418ac53f47a78e1266addd65Affected
2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before a6535d00a9d54ce1c2a8d86a85001ffb6844f9b2Affected
2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 52a0d88c328098b4e9fb8f2f3877fec0eff4104bAffected
2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before ff727ab0b7d7a56b5ef281f12abd00c4b85894e9Affected
2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before f36e754a1f0bafb9feeea63463de78080acb6de0Affected
2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 76a964ad0ea8f2b10abd69a7532e174a28258283Affected
2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 70df04433fd351ba72bc635bd0b5fe443d9ac964Affected
2865d42c78a9121caad52cb02d1fbb7f5cdbc4ef to before 0458e5428e5e959d201a40ffe71d762a79ecedc4Affected

LinuxLinux

2.6.37Affected
before 2.6.37Not affected
4.9.318 through 4.9.*Not affected
4.14.283 through 4.14.*Not affected
4.19.247 through 4.19.*Not affected
5.4.198 through 5.4.*Not affected
5.10.122 through 5.10.*Not affected
5.15.47 through 5.15.*Not affected
5.17.15 through 5.17.*Not affected
5.18.4 through 5.18.*Not affected
5.19 and laterNot affected

References

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