CVE-2022-49741: fbdev: smscufx: fix error handling code in ufx_usb_probe
First published: Thu Mar 27 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: fbdev: smscufx: fix error handling code in ufx_usb_probe The current error handling code in ufx_usb_probe have many unmatching issues, e.g., missing ufx_free_usb_list, destroy_modedb label should only include framebuffer_release, fb_dealloc_cmap only matches fb_alloc_cmap. My local syzkaller reports a memory leak bug: memory leak in ufx_usb_probe BUG: memory leak unreferenced object 0xffff88802f879580 (size 128): comm "kworker/0:7", pid 17416, jiffies 4295067474 (age 46.710s) hex dump (first 32 bytes): 80 21 7c 2e 80 88 ff ff 18 d0 d0 0c 80 88 ff ff .!|............. 00 d0 d0 0c 80 88 ff ff e0 ff ff ff 0f 00 00 00 ................ backtrace: [<ffffffff814c99a0>] kmalloc_trace+0x20/0x90 mm/slab_common.c:1045 [<ffffffff824d219c>] kmalloc include/linux/slab.h:553 [inline] [<ffffffff824d219c>] kzalloc include/linux/slab.h:689 [inline] [<ffffffff824d219c>] ufx_alloc_urb_list drivers/video/fbdev/smscufx.c:1873 [inline] [<ffffffff824d219c>] ufx_usb_probe+0x11c/0x15a0 drivers/video/fbdev/smscufx.c:1655 [<ffffffff82d17927>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [<ffffffff82712f0d>] call_driver_probe drivers/base/dd.c:560 [inline] [<ffffffff82712f0d>] really_probe+0x12d/0x390 drivers/base/dd.c:639 [<ffffffff8271322f>] __driver_probe_device+0xbf/0x140 drivers/base/dd.c:778 [<ffffffff827132da>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:808 [<ffffffff82713c27>] __device_attach_driver+0xf7/0x150 drivers/base/dd.c:936 [<ffffffff82710137>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427 [<ffffffff827136b5>] __device_attach+0x105/0x2d0 drivers/base/dd.c:1008 [<ffffffff82711d36>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487 [<ffffffff8270e242>] device_add+0x642/0xdc0 drivers/base/core.c:3517 [<ffffffff82d14d5f>] usb_set_configuration+0x8ef/0xb80 drivers/usb/core/message.c:2170 [<ffffffff82d2576c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [<ffffffff82d16ffc>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [<ffffffff82712f0d>] call_driver_probe drivers/base/dd.c:560 [inline] [<ffffffff82712f0d>] really_probe+0x12d/0x390 drivers/base/dd.c:639 [<ffffffff8271322f>] __driver_probe_device+0xbf/0x140 drivers/base/dd.c:778 Fix this bug by rewriting the error handling code in ufx_usb_probe.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | <5.4.232 | |
| Linux Kernel | >=5.5<5.10.168 | |
| Linux Kernel | >=5.11<5.15.93 | |
| Linux Kernel | >=5.16<6.1.11 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://git.kernel.org/stable/c/3b3d3127f5b4291ae4caaf50f7b66089ad600480
- https://git.kernel.org/stable/c/3931014367ef31d26af65386a4ca496f50f0cfdf
- https://git.kernel.org/stable/c/64fa364ad3245508d393e16ed4886f92d7eb423c
- https://git.kernel.org/stable/c/1b4c08844628dfc8d72d3f51b657f2a5e63b7b4b
- https://git.kernel.org/stable/c/b76449ee75e21acfe9fa4c653d8598f191ed7d68
Frequently Asked Questions
What is the severity of CVE-2022-49741?
CVE-2022-49741 has been evaluated and classified as a vulnerability with potential security implications in the Linux kernel.
How do I fix CVE-2022-49741?
To fix CVE-2022-49741, update to the latest version of the Linux kernel where the vulnerability has been patched.
What components are affected by CVE-2022-49741?
CVE-2022-49741 affects the Linux kernel's fbdev subsystem, specifically the smscufx driver.
Is CVE-2022-49741 publicly disclosed?
Yes, CVE-2022-49741 has been publicly disclosed and documented in the Common Vulnerabilities and Exposures database.
What type of vulnerability is CVE-2022-49741?
CVE-2022-49741 is primarily an error handling issue within the ufx_usb_probe function in the Linux kernel.
- collector/mitre-cve
- source/MITRE
- agent/description
- agent/first-publish-date
- agent/references
- agent/author
- agent/source
- agent/type
- agent/title
- agent/guess-ai
- agent/software-canonical-lookup
- collector/nvd-api
- source/NVD
- agent/weakness
- agent/last-modified-date
- agent/severity
- agent/remedy
- agent/softwarecombine
- agent/tags
- agent/event
- vendor/linux
- canonical/linux kernel
- version/linux kernel/5.5
- version/linux kernel/5.11
- version/linux kernel/5.16