GHSA-CX4P-CV2H-HF45
Vulnerability from github – Published: 2025-03-27 18:31 – Updated: 2025-04-14 21:32In 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: [] kmalloc_trace+0x20/0x90 mm/slab_common.c:1045 [] kmalloc include/linux/slab.h:553 [inline] [] kzalloc include/linux/slab.h:689 [inline] [] ufx_alloc_urb_list drivers/video/fbdev/smscufx.c:1873 [inline] [] ufx_usb_probe+0x11c/0x15a0 drivers/video/fbdev/smscufx.c:1655 [] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396 [] call_driver_probe drivers/base/dd.c:560 [inline] [] really_probe+0x12d/0x390 drivers/base/dd.c:639 [] __driver_probe_device+0xbf/0x140 drivers/base/dd.c:778 [] driver_probe_device+0x2a/0x120 drivers/base/dd.c:808 [] __device_attach_driver+0xf7/0x150 drivers/base/dd.c:936 [] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427 [] __device_attach+0x105/0x2d0 drivers/base/dd.c:1008 [] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487 [] device_add+0x642/0xdc0 drivers/base/core.c:3517 [] usb_set_configuration+0x8ef/0xb80 drivers/usb/core/message.c:2170 [] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238 [] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293 [] call_driver_probe drivers/base/dd.c:560 [inline] [] really_probe+0x12d/0x390 drivers/base/dd.c:639 [] __driver_probe_device+0xbf/0x140 drivers/base/dd.c:778
Fix this bug by rewriting the error handling code in ufx_usb_probe.
{
"affected": [],
"aliases": [
"CVE-2022-49741"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-03-27T17:15:38Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: smscufx: fix error handling code in ufx_usb_probe\n\nThe current error handling code in ufx_usb_probe have many unmatching\nissues, e.g., missing ufx_free_usb_list, destroy_modedb label should\nonly include framebuffer_release, fb_dealloc_cmap only matches\nfb_alloc_cmap.\n\nMy local syzkaller reports a memory leak bug:\n\nmemory leak in ufx_usb_probe\n\nBUG: memory leak\nunreferenced object 0xffff88802f879580 (size 128):\n comm \"kworker/0:7\", pid 17416, jiffies 4295067474 (age 46.710s)\n hex dump (first 32 bytes):\n 80 21 7c 2e 80 88 ff ff 18 d0 d0 0c 80 88 ff ff .!|.............\n 00 d0 d0 0c 80 88 ff ff e0 ff ff ff 0f 00 00 00 ................\n backtrace:\n [\u003cffffffff814c99a0\u003e] kmalloc_trace+0x20/0x90 mm/slab_common.c:1045\n [\u003cffffffff824d219c\u003e] kmalloc include/linux/slab.h:553 [inline]\n [\u003cffffffff824d219c\u003e] kzalloc include/linux/slab.h:689 [inline]\n [\u003cffffffff824d219c\u003e] ufx_alloc_urb_list drivers/video/fbdev/smscufx.c:1873 [inline]\n [\u003cffffffff824d219c\u003e] ufx_usb_probe+0x11c/0x15a0 drivers/video/fbdev/smscufx.c:1655\n [\u003cffffffff82d17927\u003e] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396\n [\u003cffffffff82712f0d\u003e] call_driver_probe drivers/base/dd.c:560 [inline]\n [\u003cffffffff82712f0d\u003e] really_probe+0x12d/0x390 drivers/base/dd.c:639\n [\u003cffffffff8271322f\u003e] __driver_probe_device+0xbf/0x140 drivers/base/dd.c:778\n [\u003cffffffff827132da\u003e] driver_probe_device+0x2a/0x120 drivers/base/dd.c:808\n [\u003cffffffff82713c27\u003e] __device_attach_driver+0xf7/0x150 drivers/base/dd.c:936\n [\u003cffffffff82710137\u003e] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427\n [\u003cffffffff827136b5\u003e] __device_attach+0x105/0x2d0 drivers/base/dd.c:1008\n [\u003cffffffff82711d36\u003e] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487\n [\u003cffffffff8270e242\u003e] device_add+0x642/0xdc0 drivers/base/core.c:3517\n [\u003cffffffff82d14d5f\u003e] usb_set_configuration+0x8ef/0xb80 drivers/usb/core/message.c:2170\n [\u003cffffffff82d2576c\u003e] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238\n [\u003cffffffff82d16ffc\u003e] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293\n [\u003cffffffff82712f0d\u003e] call_driver_probe drivers/base/dd.c:560 [inline]\n [\u003cffffffff82712f0d\u003e] really_probe+0x12d/0x390 drivers/base/dd.c:639\n [\u003cffffffff8271322f\u003e] __driver_probe_device+0xbf/0x140 drivers/base/dd.c:778\n\nFix this bug by rewriting the error handling code in ufx_usb_probe.",
"id": "GHSA-cx4p-cv2h-hf45",
"modified": "2025-04-14T21:32:23Z",
"published": "2025-03-27T18:31:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49741"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1b4c08844628dfc8d72d3f51b657f2a5e63b7b4b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3931014367ef31d26af65386a4ca496f50f0cfdf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3b3d3127f5b4291ae4caaf50f7b66089ad600480"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/64fa364ad3245508d393e16ed4886f92d7eb423c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b76449ee75e21acfe9fa4c653d8598f191ed7d68"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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