CVE-2022-49741

MEDIUM EPSS 7.5%
Published Mar 27, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Mar 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
7.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel* <5.4.232
linuxlinux_kernel*≥5.5  –  <5.10.168
linuxlinux_kernel*≥5.11  –  <5.15.93
linuxlinux_kernel*≥5.16  –  <6.1.11

References 5

  • git.kernel.org https://git.kernel.org/stable/c/1b4c08844628dfc8d72d3f51b657f2a5e63b7b4b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3931014367ef31d26af65386a4ca496f50f0cfdf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3b3d3127f5b4291ae4caaf50f7b66089ad600480
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/64fa364ad3245508d393e16ed4886f92d7eb423c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b76449ee75e21acfe9fa4c653d8598f191ed7d68
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1b4c08844628dfc8d72d3f51b657f2a5e63b7b4b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3931014367ef31d26af65386a4ca496f50f0cfdf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3b3d3127f5b4291ae4caaf50f7b66089ad600480
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/64fa364ad3245508d393e16ed4886f92d7eb423c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b76449ee75e21acfe9fa4c653d8598f191ed7d68
    Patch