# CVE-2022-49301: linux: In the Linux kernel, the following vulnerability has been resolved:  staging: rtl8712: fix uninit-value in usb_read8(...

CVE-2022-49301 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49301, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49301
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  staging: rtl8712: fix uninit-value in usb_read8() and friends  When r8712_usbctrl_vendorreq() returns negative, 'data' in usb_read{8,16,32} will not be initialized.  BUG: KMSAN: uninit-value in string_nocheck lib/vsprintf.c:643 [inline] BUG: KMSAN: uninit-value in string+0x4ec/0x6f0 lib/vsprintf.c:725  string_nocheck lib/vsprintf.c:643 [inline]  string+0x4ec/0x6f0 lib/vsprintf.c:725  vsnprintf+0x2222/0x3650 lib/vsprintf.c:2806  va_format lib/vsprintf.c:1704 [inline]  pointer+0x18e6/0x1f70 lib/vsprintf.c:2443  vsnprintf+0x1a9b/0x3650 lib/vsprintf.c:2810  vprintk_store+0x537/0x2150 kernel/printk/printk.c:2158  vprintk_emit+0x28b/0xab0 kernel/printk/printk.c:2256  dev_vprintk_emit+0x5ef/0x6d0 drivers/base/core.c:4604  dev_printk_emit+0x1dd/0x21f drivers/base/core.c:4615  __dev_printk+0x3be/0x440 drivers/base/core.c:4627  _dev_info+0x1ea/0x22f drivers/base/core.c:4673  r871xu_drv_init+0x1929/0x3070 drivers/staging/rtl8712/usb_intf.c:401  usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396  really_probe+0x6c7/0x1350 drivers/base/dd.c:621  __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+0x6c7/0x1350 drivers/base/dd.c:621  __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+0x1b91/0x2950 drivers/usb/core/hub.c:2566  hub_port_connect drivers/usb/core/hub.c:5363 [inline]  hub_port_connect_change drivers/usb/core/hub.c:5507 [inline]  port_event drivers/usb/core/hub.c:5665 [inline]  hub_event+0x58e3/0x89e0 drivers/usb/core/hub.c:5747  process_one_work+0xdb6/0x1820 kernel/workqueue.c:2289  worker_thread+0x10d0/0x2240 kernel/workqueue.c:2436  kthread+0x3c7/0x500 kernel/kthread.c:376  ret_from_fork+0x1f/0x30  Local variable data created at:  usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33  r8712_read8+0xa5/0xd0 drivers/staging/rtl8712/rtl8712_io.c:29  KMSAN: uninit-value in r871xu_drv_init https://syzkaller.appspot.com/bug?id=3cd92b1d85428b128503bfa7a250294c9ae00bd8

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.5-1 | [DEBIAN-CVE-2022-49301](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49301.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.5-1 | [DEBIAN-CVE-2022-49301](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49301.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.5-1 | [DEBIAN-CVE-2022-49301](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49301.md) | Feb 26, 2025 |

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